Refusing to close my paid up account.

My account was handed over in Dec. I settled it on the 2nd of May. I contacted the lawyers it was handed over to and they confirmed that they sent an email to finchoice to close it but it is still active. I called and the agent boldly told me that it can take up to 3 years before it is closed. According to which law? Is this how you fool people on a daily or I was just the unlucky one? I know my rights and I know for a fact that there is no such thing as closing the account after 3 years. I sent an email and I was blue ticked, as I've been blue ticked for the past year. I want that account closed. It's even discouraging to pay off the other account if y'all gonna mess around like this. Close my 12 months loan finchoice.