Terrible Service and Unauthorized Debits

I called Nu Debt Management 7 times, this morning enquiring about an unauthorized R3100 debit that went off my account last night. I was told by a very rude agent by the name of Lebogang Mtshali that it is because my Telkom account is owing. I explained that I just got the account and the first debit went off successfully this month on the 5th, so how am I in arrears. The consultant refused to assist by either keeping quiet, refusing to give her details to identify her, clicked her tongue at me, and refused to send me through to a manager by the name of Elaine who was supposedly too busy to take calls. It took me 7 calls with my airtime to get absolutely no assistance with my query at all. I am still R3100 out of pocket on top of my R1600 debit.