The technician you sent out again said the compressor need to be replaced without doing proper testing. You told me that if I hire you to replace the compressor you will credit me the cost for TXV job you did. You also told me that there could be 20 different things causing the same problem. I don't want to pay you to replace 20 different things.
I already paid you $800 three months ago for something did not need to be replaced. I am not going to pay you a few thousands of dollars more to replace the compressor.
I hired a more reputable air conditioning company couple weeks ago, they refilled freon with dye and they will determine where the leak is.