Annoying

The agents and service from car track is appalling. After cancelling your services expect to be called million times as if you dying. I cancelled my services and the car track and this month November they sent me a WhatsApp saying I qualify for a discount of R3000 couple of rands in order for my arrears amount to be settled, I told them I don’t have it and after agreeing that I can pay R2500 I made the payment but now they are calling me non stop after I paid them, they are telling me I still need to pay R5000. The agents are even non effective and do not make a person understand. WHAT WAS I PAY THE R2500 for if it not was for arrears?