Nudebt and Telkom

Nudebt , they never made any arrangements with me , no calls and they decide to debit my account during the month. bank charges me cause of this. Further to this they are debiting for Telkom for a month missed premium , they got the money so it takes 14 days to reflect on the Telkom system. Who is Nudebt and why are they allowed to do whatever they want with my account and without permission. So it's simple now to just do whatever you want with my account