Telkom Credit Management Refusal To Pay Refund On Closed Account Double Payment - claiming to use the money for Legal Fees

Telkom Credit Managment:

I cancelled my telkom wifi subscribtion on time using the my telkom portal and Telkom continued to bill me incorrectly for 3 months. Then they handed the unpaid bill to NuDebt Management. i tried to query this with them but i struggled to get their customer services on 081 180. i could not even get customer services email details until they handed they debt over. i no longer had strenght to fight so i decided to pay off the debt.

i made a schedule payment to pay it off and forgot about it and decided to do the EFT payment of the same amount. When i realised that i double paid, i sent the 2 POPs to NuDebt- their collectors who referred me back to Telkom.

i went to their branch in Menlyn and was told CS will call but that never happened. By God's Grace on this special day i managed to get through to CS and they acknowledged that they can see a credit on my account. i told them that i would like a refund. i had to resend POP thou the credit is there. I waited 2 weeks and there was no response.... i googled and managed to get Telkom Kenya CS email and sent my query to them. it's only then that i managed to get some response from Executive Customer Relations - (CEO, Executive, National Customer Care and Customer Escalations Desk) who forwarded my query to Credit Management. After 3 days i got a response from her to say: The feedback from our Credit management is that: "The credit on this account is not refundable. This payment was made to us (Telkom) by our External debt Collectors as the customer was handed over and will cover legal cost."

The amount that i paid them already included legal fees.... what other legal fees are they talking about. if i hadnt paid the double amount where would they have recieved these legal costs?

i want my money refund and strongly believe that this case was not handled well by their credit management.