Vodafone is once again the most complained-about mobile network according to data compiled by telecoms regulator Ofcom, with the firm getting three times the average industry-wide number of customer gripes.

While the total number of complaints about Vodafone continues to fall steadily compared with its 2015 peak, the company still attracted far more complaints than its rivals in the three-month period from July to September, reflecting a chaotic year in which it was dogged by mass billing errors and customer service problems.

In June MoneySavingExpert.com first urged all Vodafone customers to check their bills after our investigation uncovered a huge number of problems with billing, incorrect tariffs, customer service and other issues. In October the company was hit with a £4.6 million fine by Ofcom as a result of the failings.

See our Vodafone Warning guide for full info.

What the latest figures show

Ofcom received 18 Vodafone complaints per 100,000 customers during the three-month period – three times the industry-wide average of just six per 100,000.

Joint next-worst firms TalkMobile and Virgin Mobile each had less than half the number of Ofcom complaints experienced by Vodafone, both with eight per 100,000 customers.

Most complained-of mobile providers (pay-monthly customers)

Network Complaints per 100,000 customers
Vodafone 18
TalkMobile 8
Virgin Mobile 8
TalkTalk 6

Least complained-of mobile providers (pay-monthly customers)

EE 5
02 3
Three 3
Tesco 1

Responding to the results, Vodafone said: "The Ofcom report highlights the continued improvement in our customer services delivery, with the number of complaints to Ofcom down over 40% since the beginning of the year. We are making positive progress in customer services, with a 50% reduction in overall complaints this year, but fixing these issues is our highest priority for 2017."

CHECK if you're affected by Vodafone errors

If you're a Vodafone customer, we urge you to check your bills ASAP – the sheer scale of reported problems means you can't assume you've been charged correctly.

1) Your bill may be wrong – check it. Look at your most recent bill (if you don't have a paper bill to hand, check online) and see if anything looks wrong to you. You know your tariff (check your email confirmation or paperwork if unsure) and usage better than anyone.

2) Even if your bill's correct, check your bank statements too. Some people have found the wrong amount's been taken, so make sure you've not been double- or triple-charged, and if you've cancelled, check you're not still paying.

3) Found a problem? Check your credit score. We've heard of a number of cases where a mistake on Vodafone's part has led to credit agencies and debt collectors getting involved – meaning credit scores are damaged as a result.

What about broadband, landlines and TV?

The Ofcom figures also identify the most complained-about firms for landline phones, home broadband and pay TV.

The latest figures show it's been a frustrating few months for customers of BT and BT-owned firms Plusnet and EE, with the group of companies dominating the complaints tables – particularly in the broadband category:

Most complained-of broadband providers

Network Complaints per 100,000 customers
BT 36
Plusnet 30
EE 26

Least complained-of broadband providers

TalkTalk 19
Virgin Media 11
Sky 7

Plus BT was the worst performer by a considerable margin in terms of pay-to-view TV complaints:

Most complained-of pay-to-view TV providers

Network Complaints per 100,000 customers
BT 19
Virgin Media 7
TalkTalk 6

Least complained-of pay-to-view TV providers

Sky 1

And BT-owned Plusnet topped the landline complaints figures, with EE coming joint-second alongside the Post Office, and BT itself coming fourth:

Most complained-of landline providers

Network Complaints per 100,000 customers
Plusnet 24
EE 20
Post Office 20
BT 19
TalkTalk 16

Least complained-of landline providers

Virgin Media 10
Sky 6

Check our Cheap Broadband guide for the best deals on home internet, and our Home Phone guide to help you slash the cost of calls.

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