O2

I have just had an email saying i am been charged £170 for roblox when i checked my accounts this has been charged over the last 2 days me nor my partner who has the sim in her tablet play the game i did start a live chat with o2 but then they seemed...

I have lost a sim card which I need I have been trying for 2 days to get in touch with o2 but because I am not up grading or leaving them I can not get through any one know a way that I can get a replacement sim