Cartrack Worse service.

Cartrack installed tracker on my Car in January and before i even agreed to the package i told asked the consultant when will car track debit from my account as now i have no funds and want it to do end of month everytime. This was confirmed by the consultant and we went ahead. Just 3 days after installation a debit was sent to my bank and i had no money so it bounced. The next 5 days or so after that i had some money in my account(15 January 2019) and cartrack came back and debited the monthly debit amount which we agreed it will go month end and not mid month. I called the lady at cartrack and told her she must make sure i dont get debited again month end as they did now, she assured me, but come month end they debited again. I called to ask about this after checking my statement which also had a R50 which i did not know what it was for. The gentleman advised that its incorrect charges and asked that i dispute them on my side as on cartrack side it will take time to reflect in my bank, i did so. Today 28 Feb i get an sms telling me i disputed a 50rand so i need to contact them urgently to avoid legal actions. they say R50 was for when debit bounced.

I havent even been with this company for 2 months and ive experienced amateur service. I need a proper explanation for this.