Relentless calls from car track!!

After canceling my car track account months ago they are continuously phoning me about an outstanding payment of R220. I made my last payment plus gave them a 1 month notice and paid again after the notice period. I have send proof of payment to them and the layers that keep phoning me day and night. Yet I am bombarded by their calls!!! There is no end to this desperate company! They will phone hundreds of times, interrupting sleep and working hours!! Never ever use them, because they are relentless about money! No matter how many car track people phone, I have to every time repeat the story and send proof op payment! Their calls are at a uncontrollably high level, hundreds of calls!! Never ever in my life will I use or recommend them to anyone!!