No accountability/No one willing to assist

So I got a call from a lady by the name of Nhlanhla from Cartrack sometime last week and she told me about the add on product I can take up since I'm already a client of Cartrack, I then bought in to her sales pitch and took the package and in our conversation I SPECIFICALLY asked when my 1st debit order will go off and she CONFIRMED it will be on the 25th of February together with my normal premium that goes off every month. To my surprise my acc was debited on the 20th of Feb and the debit order came back as unpaid and I was charged bank fees, I then called in on the 22nd of Feb and spoke to a lady by the name of Mbali Mana who promised me she will get this issue resolved for me, to my surprise I was again debited on the 23rd of Feb and AGAIN I was charged bank fees, I then called in this morning and spoke to Themba who asked me to explain my issue again to him and then told me exactly what I already knew and couldn't help me. Cartrack keeps sending me smses and emails that my account is in arrears which is incorrect. Can I please get someone to call me and resolve this issue for me if it's not too much to ask for. I am even regretting taking out this product with Nhlanhla as it is more trouble it's worth. No one at Cartrack is taking me seriously.