Unauthorised Debit Order

On the 15th of September 2020, there was an unauthorised debit occurred from my bank account with reference name of Telkom Mobile. I went to the bank to reverse the debit, then went to Telkom Branch in Nelspruit Langamall to enquire about that debit and I was told that there is an account opened with my particulars. I told them I know nothing about such account, then I was asked to give them my proof of residence, Bank statement, ID copy and an affidavit so that the case can be open. On follow up, nothing being done on my case. October 2020 debited double the amount, I reversed it and still nothing being done on my case. November 2020, did the follow up, still nothing being done but luckily no debit order occurred. Now 10 and 11 December 2020, boom triple debit orders with interest. What on earth have I done to deserve such blow from you Telkom? I mean kids needs Christmas goodies and you just ignored my concern. Please Peter help me to clear my name.