Tbh I really don’t know. I’m guessing DD. No money has come out of my account for it, I have checked that

Firstly hello, I’ve just joined so I’m not sure if this is the right place to post. Last year I was looking at my credit report and noticed a mobile phone contract I didn’t recognise with 02 I called them to find out what was going on. I cancelled it there and then only to get a very irate phone call from my ex of 8 years ago saying he was using it as his business phone! I don’t know how he’s managed to take the contract out in my name and get the upgrades etc without coming to my house. He lives about 30 miles away from me. He then said it was a contract we had taken out when we were together probably 10+ years ago. I honestly don’t remember doing it. He’s now left me with a bill of £265 to pay and is refusing to pay it! Before I go to O2, the Police or whatever is there anything I can do? I really can’t believe the cheek of it especially when he has a new partner and she could have got him a phone. I’m really blazing about it all! any advice gratefully received, thank you for reading.