Telkom took my money without my permission

I have a contract with Telkom I pay R209.00 every 5th of the month as per our agreement. So it happened that on the 5th of August they didn’t get the amount and the main reason is because I forget to transfer money into my bank account but following day which is on the 6th I paid them as in missed it on the due date. Then I was expecting the debit to continue as usual after that but nothing they didn’t take their money on the 5th of September then I went to branch to find out why they said they don’t know but I have to come follow week to update my banking details I said ok and I went to them on the 6th and I paid R210. 00 on that date on my own as I didn’t understand why they didn’t take the money. Yesterday 25.09.25 I received a call from them asking me why I didn’t pay amount of R698.80 I asked them it’s for what because I paid the monies that you didn’t take on my account then they asked me to send a proof I did n so far they didn’t come back to me.Today 26.09.25 Telkom took on my bank account amount of R698.80 and I don’t like that first of all I’m not owing them a cent number two this is not the date we agreed about for them to take the money so who gave them the permission to take my money with out my authority and what I hate most I’m not even owing them kindly assist I’m not happy about this and I want my money back to me as soon as possible I need it a want to pay my other bills