Bought 3 windows and a patio door from them and ha...

Bought 3 windows and a patio door from them and had 2 windows and a patio door with blemishes between the glass. After waiting months for replacement, the 3 replacement windows had worse defects. Waited several months (again) to get replacement and pgt service rep said one window was damaged and he knew nothing about patio door. One month later he said he would need to come out to check on flaws of windows even though this had already been done? Called customer service repeatedly and no one calls back. Basically I just want to let them know not to bother since I have no confidence this company can make this right so in order to avoid further stress, I give up!