Useless agents and shocking service from Cell C

Dealing with Cell C call agents is like drawing blood from a stone. They don't listen to a word you have to say and when you ask to speak to a manager, there is never anyone available. For months now i have been trying to explain to someone that my contract has expired in January 2021 and with not wanting to upgrade, all we were supposed to be billed was the airtime and data subscription which according to the package and confirmation from an agent is only supposed to be R 229 per month yet i am being billed R 617.00 as at my last debit. No one can seem to explain to me why this is but they can easily suspend your line if there is non-receipt of payment. I called in again today and held on the line for 32 minutes for a manager to assist but since the agent had made up her mind that she was not going to assist and provide me with the details of the manager or transfer me immediately, she just placed me on hold without any further feedback. Useless cannot even describe the people at Cell C and shocking doesn't even describe the service.