Cancel my contract! It should not be this difficult.

Cell C is making it impossible to cancel my contract after it's expired. I've called 8 times in the last three weeks. I either get disconnected immediately, I get transferred and then hung up on or they refuse to help my because I "cannot verify" my account. Upon asking to speak to a supervisor because I am really frustrated with the horrible customer service, I am asked "what would you like to speak tona supervisor about?" and then she says well they will tell you the same, confirm your information and call back. This with the same information I verify with on previous calls. After eventually getting through to the retentions department two weeks ago, and my cancelation was supposedly processed, I never received a text message on either numbers provided confirming this as they said I would, they are also "unable" to send this confirmation via email for some unknown reason. Then when calling again to confirm its been canceled, they say the lines are very busy and to please reach out via customer service email. After doing that, they said they need to call me to confirm the cancelation. And que the same process of transfers, verifications and starting said cancelation. I am over it. I just want my contract. I don't need it. If anyone from cell c actually reads this. DO NOT TRY TO CALL ME. Send me an email to confirm my contract has been canceled.