Big scammer, I’m sure O2 also part of this scam. Don’t trap!!!! One of staff his name is habib, he is big lair, he don’t tell all true details just say you pay £10, unlimited min and text, with 20gb data.when I ask him is that cash back method ? He said no we will pay you some money first and you only pay £10 from your account. And he didn’t say anything about first 18months rebate after 18 months must to upgrade otherwise rest 18months full money have to pay… and also he didn’t say anything about cooling off period. Be careful his name is habib. Pls if you got chance to speak him just make sure record the conversation.