Best Generator Installation in Tampa FL

I had a coupon with tune up for $39 value (1 lbs freon free included if freon was low). When he comes up, freon was low and there was chance of leak. So he made it service call as it was low in freon and AC was not working well according to him, and further the leak detection was chargeable to $198 + freon (chargeable for all)+ fixing it (unknown price).
Now coupn says if low on freon in AC tune up and technician says service call if low in freon and then makes it a leak detection. So 3 star. As it seems complicated to me.

Tune up means clean up drain lines, check for any leak and that all parts of AC are working fine. But only got freon checked in service call/ tune up but paid for all as coupn was waste.
We just got freon added and AC is running well.

I m not prepared to pay for leak detection and fixing as AC was checked 6 months back by AAA airwaves and 2 lbs freon was added too (Sept.) when they came to see AC stopped (coz of ice). So 99% chances last company cheated on us. I have had experience with 3 companies so far and just end paying much more everytime and worst part is AC is 2014 built. I need recommendation on right AC company.

Horrible service. Had a AC unit installed 5 years ago. It's been leaking since day one. Every time they come out they charge a service fee, but they never fix the problem. I've spent close to $700 in service charges alone. Add that to the money I've spent on repairs and it's well over $1000. I would not recommend this company at all. I'd give zero stars if I could.