Telkom mistake

I was contacted by Selldirect a representative of Telkom for a new offer....

The salesman was very pleasant and helpful....

He offered me a data sim deal at R99 i took it in December. He promised since I already have an account with Telkom basically I just have to agree to the deal.

Then in February i got another call for a wifi router deal...all was good so I took that deal as well.

Since February I have been getting messages to say that my account has not been paid and it will be suspended. End of Jan Telkom debit order went off, end of February Telkom debit order went off.

Now mid March i have been suspended as my account haven't been according to Telkom.

I have send them my bank statements and everything to show it has been debited.

Now they claim that i have 2 account and that the debit order has gone off the wrong bank account and it was rejected.

Why should i be liable for the rejection fee if i was responsible for the incorrect bank details. Im willing to pay for my subscription fees but not the rejection fees.

What can i do