Cartrack harasses their customers mercilessly!

I was contacted by a representative of cartrack om the 1st of July demanding payment in order to reinstate my services. Then when I got upset and explained to her that 1. I pay my cartrack payment from my sassa that gets paid sometimes even om the 6th and 3rdly now she is threatening me telling me I must pay now. Then she tells me that no she did not threaten me. I explained to her right at the begining of the call she told me my account is in arrears for July (on the 1st of July already) and that I had to pay to reinstate my services. Then she turned coat and told me have I checked my cartrack app and have it been dissabled? I then told her no I did not because I had no need to. I then agian explained to her that I asked in the past and they moved my due date to the 7th because of when my sassa gets paid in and now on the first she already phones me and tells me that my account is in arrears and that I have to make immediate payment to reinstate my services (go and listen to the call). I then told her this month I happen to get my money on the 3rd of this month from sassa then I will make a pyment. Then she again told me that she will set my due date for the 7th. What does it help if thwy set it for the 7the but already strt threatening you on the first? Whats the use then? I also requested that when my contract with cartrack matures I want it to be terminated as I had ENOUGH with the hell that cartrack has put me through. Their service is 10 stars below pathetic! Then when I do the payment and I send the proof of payment through to a list of about 10 people's email addresses that I have gathered up from complaints and issues thus far then I get a reply back confirming receipt of the proof of payment, but them what the hell is the use? They still harrass me for about a week after that still and they NEVER apologise for their threatening emails, sms messages and phone calls. You as client just have to eat it up and take the abuse from them. This company has the WORSE finance department of ANY company in the world that I have had to deal with. I personally feel they can just cancel my account and we go our own seperate paths and have the headache end once and for all. Speak to a managar or a director or give me the director's email address. I BET YOU you will be to scared to give me your director's email address because you messed up and do not want them finding out!!! So in stead of giving me some lame as apology give me the email address of someone that can actually do something about it. Or ar you too scared?