Cancellation Dispute

Good day, I cancelled my account a few months ago, and I was sent a link to proceed with the cancellation. Then I received a notification that there is an outstanding balance on my account, I think it was around R400. But I was assured that should I settle that amount, my account would be closed. After that, I still received emails and calls from your consultants stating that there was still a balance outstanding. I have reported this matter to Hello Peter and there was no solution, I'm constantly harassed by your consultants. If you do not resolve this matter, I will escalate this matter to the ombudsman. Your sales/collection is very effective when it comes to your money, but your cancellations department is difficult to be reached. I am also not taking responsibility for the current outstanding balance, I refuse to take blame for your own administration setbacks.