AZ Motors

I bought a used car on the 24th of February 2020 and already put almost $700 dollars into it from the time I drove it off the lot considering it was sold as is I had no problem
Paying for minor stuff but on the fourth day of me having the Vehicle the auto shop told me that the engine was knocking to return it I was required 5 days to return by law they sold me a lemon as I drove off the auto shop the car stopped on me shut off as it was knocking I had it towed to the shop and showed up requesting a refund they told me nothing at all was wrong with the car but didn’t want to refund me my $4550 I had just gave up 4 days prior I didn’t even get to enjoy the car and they nene told me the engine was bad they also said if it’s the starter they can fix it but it it’s the engine I’m on my own how is that when I just gave them all that money and I didn’t even drive the car 30 miles it’s just unfair and I feel like they selling lemons and know they are and don’t care and we are stuck with no car