Difficulty hearing with my ReSound LiNX Quattro

I cannot hear very well since fitted with my new Resound Linx Quattro hearing aids. I got them in January, and have had right aid sent back because I couldn’t hear through it. They replaced it. Now the left one is so quiet that I cannot hear the beeping sound of it turning on. I also have problems with the charger not charging because of the custom ear molds. I have tried replacing wax guards and regularly use the drier. Even when they work, I cannot hear like I could with last pair. Audiologist has tried to adjust them many times. I am frustrated.