Terrible client service - ********** unauthorised amount deduction from bank account for unknown reason

Giving them one star is very generous. Their aftersales service and customer service is pathetic to say the least. I had two of my vehicle's tracking units installed as the ones they had in was apparently outdated (about two years old). The sales guy Bongani was very friendly and efficient on the day of installation, because I have three vehicles with Netstar he told me that he is going to give me the full package on all three cars at R199 per month as I've also been with them for many years. I was overjoyed and even the technician was very friendly, I was a happy client. That was short-lived... on 4 December an UNAUTHORISED transaction went off my HUSBAND's account for R869.39! I pay them monthly on scheduled payment from MY account so HOW did they get my husband's account number, worse... my account was fully paid up to date and there was NO reason for any payment due to them! After making countless phone calls and sending plenty unanswered emails they refunded him with not even half the amount! I still want to know WHOM gave them authority to just deduct it from my husband's account? What was the deduction for? Where is the balance of the refund? I refuse to pay installation fees on new devices which is just a replacement of their outdated devices which were still working fine. So two years from now they are going to tell me I have to again have my units replaced and charge me once again for installation... money making scheme..? In trying to get to the bottom of this ********** deduction my total irritation is in the manner they just blatantly ignore me, even smooth-talker Bongani isn't making any effort in answering any of my emails either. I feel betrayed and money **********ly ****** from me and nobody has the common decency to try and sort it out. I totally regret signing up for another two years. Lesson learnt!