My Yaris Air Condition unsolved priblem

[Abboodeh]

Hi

I'm the first owner of my Yaris 2008 Saden, so I'll get to my story right away.

Once suddenly the Air Condition stopped giving cold air, i went to two technicians and they said that my compressor failed and needs to be replaced and i have two options either i buy new one from the dealer which cost exactly $1200 (without labour) or get a used one for around $250 including labour...
So i choose the cheapest option!

After i get the compressor replaced, the air was still not that cold, so the technician replaced the old compressor with another one, and of course filled the car with AC gas.

Story didn't finish, it's not that cold so he connected my car to a PC and told me that he reprogrammed it and set it to freezing because it kept disconnecting.

Problem not solved so I went to another technician and he told me that (fridge/freezer) and the AC gas is empty....and freezer must be replaced so I got it replaced with a new non original one....

AC was fine until suddenly the air almost stopped flowing, so the technician told me the AC Fan Motor must be replaced, so I installed a used one...

Now conclusion is :
Compressor replaced
AC Fan replaced
Freezer replaced

So what the hell do I need to do now?
I touch the AC pipes under the hood, and they're cold a bit, not freezingly cold but a bit cold I know for sure they should be extremely cold...

So what could be the problem any help please.

Thanks in advance