Refusal to close my account

I paid my account last year in October to close it, Makro has refused to close my account and give me a closing statement to show that I paid for everything. I have called them several times, emailed them and went to the store. Yet even today I have not received anything. I want my account closed and proof because I dont want to have interest that I know nothing about. Makro has made me to hate accounts because of the way they have treated me. Its been over a year and nothing. I don't even know if my account is closed because they have said they will email me the letter but they never did. I have kept all the emails as proof that I have tried all my best to get my letter but they haven't. I dont think it takes more than a year to close an account.