Cell C *****ing money

After 3 months of communicating with Cell C, whereby I am doing all the phoning, they don't respond with the reviews, still no joy. The Cellphone got lost in Cell C warehouse when it was returned because I didn't want to upgrade on specific number, manager only looking for device in the meantime the phone billing still on my account. This is not right. The CEO of Cell C must be ashamed of his consultants that cannot even resolve this. As a Client of 20 years I am done with Cell C. This is very poor service that I am receiving and to be paying for something that you have returned. They are *****ing my money!!