Poor service from people owing me money

About 3 weeks ago Telkom debited my account with an amount of R939.00 for no reason. I then had to log a call with the billing department to get the money payed back to me. I have been waiting for 3 weeks for Telkom to get back to me after they told me that the issue will take between 2 and 72 hours to get resolved. I have also contacted Telkom daily to find out the status on this and every time they have told me that the case is unattended. Their level of service is disgusting!