Horrible billing system

Standard it has become the most horrible financial institution. I have a credit card with you and i believe I have fully paid this card however each month your company keep sending me statements demanding more money. I wrote to queries and collection department I respectively to get your attention and requesting that this matter be resolved. I expressed I demand fully itemized 1 statements showing all the account statements instead of sending 20 confusing statements which I believe it's your sneaky way to confuse me instead of resolving this

I have expressed that I want this card closed and I dnt believe I owe you any money

Once again today I get a statement with money outstanding. I have reached a decision that within the next 48 hours should I continue being ignored I will lay a complaint with NCR and the ombudsman. Am super tired of you standard. I have been your client for 20 years and even close my cheque account as well now