Welcome to the site,
The rules will not allow us to give do it yourself help and are only able to give technical help in the pro forums. You sound like you do not know what you are doing and just throwing expensive parts at it. Might be cheaper to call someone that knows how to trouble shoot a heat pump.
The statement below is my signature and just my overall feeling towards our industry and does not necessarily pertain to you nor this thread.
There really isn't a legitimate excuse for not doing the job correctly!