TEB Bank Credit Card Termination Complaint

Hi there, I'd like to file a complaint about TEB Bank. I attempted to close my credit card account on Cepteteb by settling all remaining balances. I reached out to customer service to inform them of my decision to close my card and successfully completed the necessary steps. Surprisingly, after a month had passed, I received an unexpected SMS informing me about an outstanding debt. During my visit to the bank branch, they informed me that my debt was still ongoing. When I made the call, the response I got was, 'Yes, sir, you still have some unpaid debt.' Even though I diligently paid off my debt, I found myself at a disadvantage as my credit score was negatively impacted. I kindly request clarification of this situation and any necessary corrections.