If I could rate 0 I would!! A shambles of a company!! Continued to add charges after being issued with a final bill which I paid! I had to request that final bill as no way to check what I owed previously as my app closed as soon as my contract ended, couldn’t pay over the phone because I didn’t have an o2 account!! So the only way to request my final bill was by raising a complaint with resolution centre!! 2 months after paying final bill I received a bill for 13 pounds, no idea why as I had paid my final bill as per amount resolution centre advised!! Then found 2 late payments on my credit file, have contacted to dispute, was told I had 12 pounds credit on my 02 account!! So they actually owe me 12 pounds yet have not thought to use that credit to pay towards the mystery 13 pounds, no instead add non payment to my credit file!! Can’t get through on a telephone because I no longer have an account!! Now they just ignore my emails and have left me unfairly with 2 crosses on my credit score!! Absolute shocker, made it so difficult because I chose to leave!! Stay well away