Telkom BIlling althoug service has been cancelled

Telkom has been billing us although we cancelled our DSL line in November and landline in February. When you call they give you the run around and althoug we have references for the calls, we are still stuck with a bill that stacks up every month, whilst we have moved over to Mweb Fibre and Voip products since November 2021. PLEASE advise where we can report Telkom since they keep billing us although there's no services utilised from them!!