O2 has the worst customer service in UK. I visited their store in portsmouth City center yesterday and met with 3 agents who said 3 different things contradicting themselves. Was told to be attended to by one of their agents who said no he prefer to attend to someone else. A lady eventually came to our rescue and was behaving like she's doing us a favour. Very rude set of people, they lack professional approach, no enthusiasm, she asked for our account details and said it not correct despite the fact that direct debit has been set on it. She just said "your account has been blocked their nothing I can do". I will never recommend it to people and will discourage any one I know from having anything to do with them.