First, I was charged PHP1700 to change the "broken thermostat" of our Samsung Ref. - and nothing happened
Next, I was charged PHP4300 to change "frion" with a 3-month warranty. After less than a month, ref is broken again.
Now, they are charging PHP6050 to "change compressor".
How are you doing the check-up? Fixing something then making sure another part is broken to charge bigger amount?
On this first place if you have competent technician, they should have spotted the problem right away