u/BigPsychological368

I have a 2021 Mazda 3 Select. Recently my AC unit stopped blowing cold air, so I took it into the dealership. They inspected it and said the PCM was malfunctioning and needed to be replaced for $1k. Had them take care of it, but didnt really use the AC for a week since it was cold weather, but when I actually tried using the AC again, it wasnt fixed. Took it back into the dealership and now they are saying that the AC Compressor needs to be replaced for $1600 and that its a completely separate issue. Am I being scammed here?