Disappointed customer

I am very disappointed with the services I've received from telkom. I was unemployed last year due to unforeseen circumstances which led my account to go in arrears, however now that I'm working; an arrangement has been made and my telkom contract is up to date, however in 2021 I helped a colleague out of good faith with a third party telkom contract since he was blacklisted. The consultant (Olivier) had arranged the contracts and upgrades for my colleague.He failed to honor his agreement by missing payments which is leaving the balance at R6000+. I have been to the telkom store to seek advice but there was zero feedback to process further. I've also indicated to the consultant to have the contract terminated with immediate effect to eliminate further cost incurred, but he didn't want to. Please assist