Online shopping

Update: 18 May, 2.10pm: Mighty Deals says all customers have now had their redemption email. It hasn't however answered our questions about what went wrong over the weekend.

Mighty Deals admits it incorrectly told more than 1,600 shoppers they couldn't get a £10 Tesco voucher for £5 after it unsubscribed them from its service, which it says it did in error – just days after angering users over the same voucher offer.

Tesco Clubcard customers can double the value of their vouchers from Monday (18 May) to spend on 12 categories online and in-store, including gaming, travel and electricals.

Amazon has finally confirmed it's increased the minimum spend for free delivery from £10 to £20 after days of confusion about the change.

Some Amazon shoppers report the minimum spend for free delivery increasing to £20, despite Amazon seemingly backtracking on plans to increase it from £10 last night.

Tesco shoppers should beware of buying or selling Clubcard vouchers, as this could result in their account or points being cancelled, MoneySavingExpert.com warns.

Consumers rights are changing from 1 October when the new Consumer Rights Act, which has been given Royal Assent by the Queen today, comes into force.

MoneySavingExpert.com has been inundated with success stories from shoppers who've claimed a refund for unused and unwanted Amazon Prime membership after following our step-by-step help.

The European Parliament has today voted to cap the charges paid by retailers to card firms when debit and credit cards are used. But there are fears the savings will be pocketed by retailers rather than being passed on to consumers and that the cap could scale down cashback and reward card deals.