Cell C bad service

We made a cash deposit into Cell C banking account as went to a branch to make the payment. They gave us Cell C banking details. In error there was one digit missing on the reference number when we made the payment was emailed 3 times confirming the payment. Even called the 084 135 to confirm the email address. Even after emailing customer care where they confirm the proof of payment has been received and gone to finance department. They call early in the morning as well as after 18h00 at night still saying the payment is outstanding. A lady by the name of Joyce she extremely rude and has no manners. The service from Cell C accounts is totally disgusting to say the least. Never experienced such total bad service and rudeness from service provider. The rudeness from this company is something else. Totally sorry we have a contract with this company. Something needs to be done about this.