I've had an EE SIM for ages so it made sense to try their unlimited data SIM when I needed a SIM for a new router. Unfortunately reception was incredibly poor in this area, which meant no service.

I visited the Welwyn Garden City store to take advantage of the cooling down period. They couldn't help me but let me use their phone to call the call centre. Call centre said they'd cancel the new SIM.

A few weeks notice I saw I'd been charged for the new SIM. After 5 or 6 calls and, each time a promise to return my money, I still don't have my refund.

So I have cancelled my original SIM and my direct debit. They only owe me approx £25 so it's not a lot of money - but it's the principle of taking a payment they should not have taken and then being incapable of refunding it. I obviously won't buy anything else from EE.