Air Conditioner problems of the 2017 Chevrolet Equinox

I've discovered that I can't go longer than 30 minutes without losing my air conditioning. I took it in to monument Chevrolet. They said there's nothing they can do because there's a bulletin out on it. I have ms, and without my air conditioning I can't go anywhere over 30 minutes. It's just miserable in texas without air conditioning. Monument told me that I would just have to wait until something could be done. Seems like my air conditioning could be replaced. This is my second Equinox, I've enjoyed every mile until now.

This involves the air conditioner. It will blow cool air and then suddenly start blowing hot air from the vents for about 15 to 30 seconds and then starts blowing cool air again. This happens while driving down the road/highway and happens when the car is stopped at red light/stop sign. It doesn't happen every time I am driving, but does happen about once a week. I drive my car to work 5 days a week. Now my air conditioner has started to have a weird chemical smell. It is hard to describe and again, does not happen every time I drive. I took my vehicle to a chevy certified service department in July 2018 and was told they did not see any issue with the air conditioner. I cannot keep having this problem with my vehicle and I need this fixed soon.