Came back from Thailand for a holiday and got a GiffGaff sim card for my phone. Once I got back to Thailand I wanted to cancel my account. Tried logging in and got told there was an error at GiffGaff end and try again in a few minutes After 2 days of trying this I emailed their customer service and they said they had to verify my identity and asked for my GDNR information. This is not like normal identity checking and they wanted several bits of information I've never been asked for before. I tried to provide this info several times but they said some of the information didn't match their records but couldn't elaborate further so that the matter could be resolved They forwarded me to their complaints dept but they were just as unhelpful In the end I had to install Giffgaff app on another device and managed to cancel my card details but GiffGaff would not confirm this (so helpful - NOT) I felt they were just wanting to keep me waiting so that they could take another payment