Horrific Service at Cell C

On the 14 June 2021 I contacted Cell C to request that they update my one account to reflect my current address that I have been at for 2.5 years. My fibre account reflects this address so I did not think it would be an issue. I received a reply on the 18 June 2021 from Thato, a customer service person, stating that it had been changed. My contract ends on 31 August 2021 so I made changes to it and emailed it through to Cell C on the 05 August 2021. I received an email confirming the business department had received my email on the same day also providing me with a number to contact should I have any queries ***). On the 01 September 2021 I called this number and was transferred from one department to another because the address I actually live at and had apparently updated successfully a couple of months ago was incorrect. Nobody could help me because my details did not match and put the phone down immediately transferring me to a survey which I obviously rated them poorly in. I need assistance please to verify that my address has changed and that my contract has been updated.