O2

Hi please my sim is lost I'm worried it went on bad hands can you please help me if it can be deactivatedIt my call sim and I can't even try call it to find out if someone has it or not, I know that there is 5 pound in it when I meant have 0 in it it...

My phone have not been able to receive call for the last 4 days its very frustrating as I cannot call customer either. I am waiting on very important call this is so wrong as my network bar is full I do receive messages but no calls come through at a...