Pathetic service from Cartrack

I regret the day I signed a contract with Cartrack, the worst company I have had to deal with. Very *********** staff that fail to follow instructions from their client yet the company is quick to make endless calls about outstanding premiums. My contract ended in June and I had spoken to a lady in May that I had asked to cancel my contract after the last debit which was due the following month being June 2021. I can't say I am surprised because like I said, it has a bunch of *********** staff. I was a month in areas when the last debit for June went off, I had expected the one premium that I owed to have gone off in July and I should not have any relationship with the company going forward, two debits went off I'm July which I then reversed one because only one premium was due to them. They called every minute which was very annoying and if the company could trace the calls I had asked these people to listen to the call recording I'm May where I had asked that the contract be canceled but everyone I had asked clearly didn't bother listening to the call as per my instruction. I then spoke to Wanda from cancelations who then assisted in canceling my contract and sent me an email confirming that the contract was canceled with immediate effect. A day later I got a call from a lady from retention who failed to even pronounce my surname and I asked to be given a day to think about renewing my contract but there honestly nothing to think about as I have had it with this company, I then spoke to her the next day and I told her I was continuing with my cancelation as requested in May. Because all the bunch of people I had spoken to did not attend to my request regarding the call I had asked to be listened to I then decided I'll pay the R250 they kept calling me about because I really cannot be harassed by a company for it ,on the 20th Aug I settled it as I do not want my name listed on ITC for a service I never used but paid for for a whole 3 years. Just when I thought I had finally got them off my back, the morning of the 21st Aug I received a text message of a notice of the outstanding fees due to them of R422 which I have no idea where it comes from and even the R250 paid on the 20th Aug was a favor which I am now demanding back because I refuse to let the company take advantage of me. The service has been nothing but pathetic, never not even once have I used Cartrack services only the app for a few days but I have paid them for the duration of the contract. I do not want any of their junior staff contacting me but I am demanding a call from one of the managers and I want this issue resolved asap. Firstly I need am explanation of the notice sent and I demand the R250 back. Secondly refer back to the calls I'm May where I confirmed that I do not want to contract to continue after the last debit. My experience with the company has been nothing but hell, I resent the day I signed that contract and will make sure that none of my friends and family join them. I have heard bad stories about it but it was rather too late because I had signed up with them. Below is my ID number, I demand one of the seniors to look into this and get back to me with a valid explanation and with a solid solution. This company is nothing but a nightmare to many.