They told me to pay an account they were supposed to pay

Was a good experience for the first few months, then all the problems started. 1st I got a statement that one account was paid up, not long thereafter started getting calls from a debt collector for the money. after weeks of me phoning every day to ask what is going on I was told there was a 3rd party that bought my debt and they will try and sort it out, extended my Debt review by 3 months. Now after all that I have received 3 statements that say I am paid up, and then when I ask for my clearance certificate, now I get told they once again they missed an account and I still ow money, and asking what happened, the only answer I get is if i don’t pay I won’t get my clearance. Pathetic if you ask me. Can’t control their accounts and make it your problem. And do not phone them, only get a call center that cant help, they will pass on your message, but no one phones back.