Vodafone has caused major problems for their customers using their phones abroad with up to £10,000 roaming charges.
Twitter lit up with complaints from frustrated holiday goers.
Many of whom had received alerts from Vodafone that their data had run out, despite the fact this was simply not true in the majority of cases.
Since 2017 UK customers have been entitled to use their data, taxes and minuted in the EU at no additional fee.
Andy Pearch spoke with the BBC that on Sunday, just 24 hours into his holiday in Malta, he had a shock when he received a text message from Vodafone informing him that he had spent £4,902.75 in “additional charges”.
To prevent him from incurring an even larger bill, Vodafone said it was preventing him from making any calls, sending text messages or using mobile data on his phone.
But when Mr Pearch logged onto his Vodafone account using the hotel Wi-Fi, it showed that he still had 14.2GB of data remaining out of his 20GB monthly data allowance.
“Stress is not the word for it,” Mr Pearch said. “My service was cut off from 22:00 last night till about 08:00 this morning.”
Vodafone has responded: “We are very sorry that some customers could not use their phones yesterday, when roaming abroad. This was due to a technical error, which we have now fixed.
“Some customers are receiving billing messages in error; we are working through these as an urgent priority and are removing any errors from customer accounts. Customers will not be charged and do not need to worry about contacting us as we are proactively checking accounts.”