Do I need a screen replacement? How to find the right part number?

I was using my computer normally in the morning, closed it and then opened it after a couple hours and started flickering bad! Didn’t dropped it or anything it was sitting on my desk. Currently my closest mac repair is not accepting appointments tho Im sure it will be a $$$ bill

I took it to a non authorized Mac repair service and they are also charging a fortune for screen replacement. the computer works perfectly fine just the screen is displaying bright pink flicketing columns and its pretty hard to use

Any suggestions on getting the replacement part? How to know if I’m buying the right part for my macbook? Im in Mexico so I need to ship here.

Thanks!