Can you just cancel and refund me please

Worst after sales service I have experienced. Ive had car tracker since 2018, post my vehicle being written off, I called them to cancel my car tracker in April over a recorded call. Since then they have continued to debit my account. I called the call center and the agent Kgomotso Malebana confirmed that a call took place in April to cancel my car tracker. She directed me to cancellations. The agent in the cancellations department confirmed the April cancellation but needed to verify this by listening to the call in April. This is only available to her 7-10 working. Please can someone from tracker connect simply cancel my tracker an refund me for the last 3 months.