Please help me! - problems with 3 mobile

KSB235

I'm not sure if this is the right board so feel free to re-direct me, but i am at my wit's end. My boyfriend had a contract with 3 mobile that he stupidly allowed to get £500 in debt (completely his own fault i know), when i found out how much debt he was in with the contract I paid the money off on my credit card and he has since paid me back the money. Because he couldn't afford the contract, when it came to the end he rang up and said he did not want it renewed, this was confirmed over the phone (i heard the conversation so i know this did happen) and we thought that was that. 2 months after he had paid the last month on his current contract he started getting billed for a new contract?!? He rang up 3 straight away and said he didn't understand why this was as he had confirmed he didn't want to renew the contract. Rather than deny this they said they actually had a record of a call with him saying he did want the contract re-newed. We asked for proof of this several times in either tape or transcript form but 3 never provided anything. They continued billing him until the bill reache approx £160 even though once his old contract had finished they cut off his number and didn't provide him with a new phone or number. Eventually they sent the debt to a collection agency, we spoke to them and explained the circumstances and they said they would no longer be collecting the debt as they had had many problems with 3 collecting money they weren't actually owed. After we spoke to the debt collectors we never heard anything from them or 3 again but later found out the £160 had been logged as a default on his credit rating. We have since added a notice of correction to this because it gave us problems when applying for a mortgage. All of this occured about 3 years ago, only TODAY he has received a letter from a debt collection agency asking for the £500 that I KNOW i paid off!! He rang them immediately and they said they couldn't comment on the nature of the cause of the debt, only they had been instructed to collect it.

Sorry for the long post but now i reall really have no idea what to do, this amount was paid off nearly 4 years ago and i don't even have the credit card i used t pay it off, can anyone please give me some advice, it would be gratefully received because otherwise i feel like 3 is going to haunt us forever, to top it off we will be looking to re-mortgage in the new year..........