Not Willing to assist

I cancelled my contract prematurely in December. I was told that there wouldn't be a debit in December because it was cancelled by the 20th of December. I then got a notification from my bank advising me that Cell c had tried to debit and the debit had returned unpaid. I called customer care to request their banking details and the amount I needed to pay, I was told they couldn't retrieve my details and I need to be put through to another department which also couldn't assist and advised me to speak to cancellation department. I spoke to Zukiswa who said I must go back to customer care, care tried to explain that I had already spoken to two department who couldn't assist. I asked to speak to the Team leader so that I can be assisted because all the agents were sending me from pillar to post, she started arguing with me and told me I had no right to request for a Team Leader I should go back to customer then she transferred the call without any warning. She was rude and unwilling to assist and that was bad customer service, why did she waste my time and do Authentication knowing very well I was in the wrong department.