Telkom overbilling

Hi. I have been experiencing disgusting service from telkom and it recently got worse. My bill for the month of March 2018 was R736. However, I was debited twice on the 25th and the last day of March for R2000 and R749 respectively. On the 1st April2018 i then recieved a sms of interruption of service. This is fraustrating. I am a loyal customer to the Telkom organisation. I have been trying to call the call center nd it jus rings. I even went to tge musgrave telkom to try and get to the bottom of this however, they just put me threw tge customer care line. Thos is my work and personal number and due to some misdemeanor i am paying for it. I then reversed voth debits due to the disgusting service and ***** debit orders. I have tried my best to resolce this matter. Can hello peter please help. I should not be blacklisted from telkom due to their irresponsible actions. Please assist. Fraustrated customer