PC never fixed

So after i complained about my PC giving a blue screen, it was booked in, and Ensure Services apparently replaced the mother board. i got the PC back, and still gave a blue screen. i couldn't book it in again, but they were notified about the issue. so the warrentee expired on the 19th of January 2023, so i managed to book it in just before that date. i got it back, and again got a blue screen. this is after i was told they replaced the Ram. So i did report that it was still not fixed, and never got a response. So i opened the laptop myself, bought new RAm, and the blue screen is fixed. It was clear all they did was swap the 2 8gig Rams around, and after i myself replaced the Ram as it should have been done, my laptop is working 100%. You cant trust that IT people are actually fixing your laptop, cause clearly nothing was done. its not like Ram even cost that much. This was negligence, and laziness.