I want my refund

I purchased a car from We buy cars. Within in a week the car broke down. I took it back to we buy cars. Long story short, the cancellation has been approved/processed. I am not sure what to call it as these words are being used interchangeably at this point. But the process of getting my money back is such a struggle. The reason I bought a car is because I NEED a car and I need the money to buy a car. I am now without a car for almost 3 weeks now. The timeline for the refund keeps changing. When I spoke to agent she insinuated I would be refunded on the day I returned the car as she said to me if I take the car back on the Sunday, there would be no managers available to approve so I should go the Saturday 12 April 2025 or Monday 14 April 2025. The refund was submitted to head office awaiting "approval" (whatever that is as I was told it is already approved). Today I was told it can take up to 72 working hours to get feedback which is 9 working day! not 72 hours which is 3 days. What feedback are they waiting for, as I was told it was already approved, I was even given the amount that WILL be paid??? I just need the refund.