Facebook

Twitter app users should urgently check their settings to avoid big data bills when videos are set to automatically play on a phone or tablet. Our investigation has found an app update this week restored this potentially wallet-busting feature as the default option for many who'd changed it.

If you use Twitter on an iPad or iPhone, check your settings now, as its new 'autoplay' default video setting could eat into your data allowance and leave you with a big bill. And for Android users, it's 'coming soon'.

Facebook and Tumblr users who mistakenly signed up to a paid-for subscription service believing they were finding out who had viewed their profile could be due refunds after the regulator fined the firm responsible £45,000.

Dieters should avoid signing up to slimming aid trials from website Raspberry Ketone Fresh, after hundreds of customers reported having unexpected payments of over £150 taken from their accounts.

Update: 18 February 2014: We tried to contact HotCrazyDeal on numerous occasions in January, but received no response. It eventually sent us a statement on Monday 17 February, which we have added below.

Thousands of credit card customers face interest rate hikes, but you can reject them to escape the potentially crippling higher payments.

Web users are increasingly looking to sites such as MoneySavingExpert.com as they are getting bored with traditional social media such as Facebook, according to a YouGov poll.

Hundreds of thousands of taxpayers who have moved home over the past few years must tell the taxman or risk missing out on a rebate that could be worth hundreds of pounds .

The public have no faith in politicians when it comes to defending their consumer rights.