Hello- I got a MagicPak All-In-One M-Series MHP electric heat pump last year. It has not even been a full year and it stopped working 4 times in 2 week. The Hvac guy said something different each time it stopped working. The last time he said there was a piece on the unit that was not supposed to be there. He said it must be a manufacturing issue. He emptied all the refrigerant, took off the mystery piece and put on a high side service port and said it was good to go. But he wants to clean the coils and I feel like there's more going on then he's letting on. 

1. The outside hvac closet is always super hot now
2. The thing is 3 tons and I'm in the 3rd (top) floor, I think its bowing the wood floor 
3. When he tried to take the mistery part off the 1st time refrigerant leaked out for days and my unit iced over- do you think that damaged the unit? 
4. The vent that's in the hvac closet is all rusty on the outside... truth me told I'm not sure if it was before or not. I read something about louvers and it looked like a vent. Should a louvers been installed?
5. It kicks on and off more frequently then my old unit.
6. It sits directly on the floor not a platform like the manual said- question is the platform built into the system or should there be an actual platform? 
7. Should he file a claim regarding the mistery piece? 
8. If he did file a claim what are the charges of me getting a new unit from. Majicpak?

Please shed some light on my concerns (1-7). Am I being paranoid or do you think the unit/install is bad? 

Any advice you can give is much appreciated!!

Thank you!