Contract worse service ever!

Worst service ever! In April 2022 a call centre agent contact to me to upgrade my current contract just to find out that another number was allocated to me. This was reported to Cell C on 3 May 2022 and till date this query has not been resolved. To make matters worse, Cell C is owing me money that was over indebted and they failing to reimburse my money despite my numerous attempts telephonically and visiting their branches The only answer that I am getting that the case is still in process and I am pushed from pillar to post. No one want to take accountability and resolve my case!