Embarrassed to have a Cell C number

I have sent countless e-mails and I have phoned. It is almost impossible to speak to someone at Cell C as they keep transferring you and then cutting you off. All I want to do is cancel my contract, because I know that once the contract has come to an end they are just going to keep taking money off and it will be impossible to be re-reimbursed because that is the type of company Cell C is. When I do finally get to speak to someone they tell me I must phone the day my contract is due to cancel, why can they not just cancel it after I have sent it to them in writing, I have not had one single response on e-mail - in writing- since I have e-mailed. They have the absolute worst customer service and I am embarrassed to have a Cell C number. Please do not respond on this "apologizing and you will look into it" nonsense because it is not true - just get someone to phone me ASAP.