Day light *******

Ive had a contract with telkom for the past 6 months or so ever since my frist billing ive been billed incorrectly. There has always been the available funds in my account for my debits infact i keep a few hundreds extea to ensure my debits going out smoothly i dont have an issue with any other debit other than telkom as even tho there is more funds than what needed to be debited i get an sms regarding me being in arrears which results in me paying an additional R202 fee every month for rhe past 6 months. It is rather frustrating as i have been into stores several times and i have also called into your billing department where consultants asked me to email my bank statements which i have done twice already and i never received feedback infact when i called in the second time they mentioned that the case was not logged thereforw i had to do it again. This is ridiculous an error i can understand but pathetic customer service is not acceptable. I am pretty sure i am not the only person this happens to this does not just affect my bank balance but my credit score and causes major inconvenience. I would like a refund on all these months you have billed me an additional R202 !!