dissappointing service

Good day, I am highly disappointed with the service I am receiving from Cartrack, in April 2016 a 3 year contract was taken with them, this contract came to an end in April 2019, but yet my account was still debited for this contract, i have been trying to get Cartrack to refund my money but nothing has taken place as yet, i have been calling Cartrack and no one comes back to me, I always have to call them, my money was taken from me so quickly but not returned the same, I am pensioner and very cents counts, besides the money being debited from my account and I’m using my own airtime to call to get this solved, but Cartrack isn’t playing their part. I am tired of the service I am receiving from them and I have decided to come to hello peter hoping my problem is escalated and I am assisted.