Cartrack

I regret the day I took a contract with cartrack, is like I have signed a deal with the devil himself. I called them and them I have sell my other car cos I can't afford them anymore so I'm left with 1 car, they told me I must pay R 2650 if don't have the car anymore or R 850 if I'm buying another car, they said I can make arrangements for 2650 n if I don't pay the 2650 in full my other car won't be covered even if I pay for it every month, I asked to pay R 100 due to my affordability they refused telling me that I must pay it in 3 months and I told them I won't have that money that's why I had to get reed of my other car, on the 25th they came into my account and deducted R700, my funeral cover and educational plan bounced because there was no funds in my account, but still I'm getting calls 3 times daily from them asking me when I'm paying the 2650