Patronizing Bunch

I paid off my account late last year and requested the account to be closed. I now learned that the person who assisted me with this request was the store manager at the Meadowdale Mall. I received the March Statement still with charges on it. The first person I spoke to couldn't assist me because I could not provide a cell number that I lost a long time ago that was used when opening the account, even though I had updated my number on the system. I called back and someone else could conveniently assist with my new number. Than they said the account was never closed because the incorrect option was chosen. I said the person(branch manager) at the branch assisted me with the form and what to choose as they were looking at my profile. Apparently they couldn't get hold of me because the number they used was not going through. I told the accounts lady I updated my number a long time ago and she said that's not what's on their system. So I said I am logged in on my profile I can clearly see the number. She proceeded to say, in any case, the account can only be closed once I pay the charges on the account, which I refuse to do. Its not my fault their staff are ***********. All of them spoke to me in an patronizing manner. They are not very sympathetic either. I probably would have agreed to pay the charges but because they were patronizing me, I refuse. They seriously need to learn how to address customers.