Doube Billed or Cell contract

This is simple query really that can be resolved

I got billed R399 twice for a cellphone contract and honestly speaking I have been inconveinced by R800 going off my account. I was meant to pay 399 only. Yesterday(25-10-2017) when I contacted customer care was told sorry about that will sort it out it was an "error".

This is clearly not how it should work to just double debit a client. I went to the bank yesterday and reversed the one 399 because I only entered an agreement for R399 not R800 else i would have even taken the phone.

Today 26-10-2017 i got an sms telling me that it shows a failed payment. How can it be a failed payment when i reverse one debit order for money that is mine??

if this keeps going on then I as a customer did not sign up for this. Im extremely frustrated about this treatment.

Can this get rectified asap please.

Regards Wisdom