How should I go up to the cooling as well as heating vendor?

I have just no idea how I should approach the Heating as well as A/C supplier that performed the work on our gas furnace.

This is the eighth time that the Heating as well as A/C vendor has failed to actually fix our gas furnace, plus she is attempting to charge me for it. At this point, I don’t even guess if the Heating as well as modern A/C supplier is honest because she never does her task well… Well, I guess that that statement is uncharitable. The Heating as well as A/C vendor used to be a superb Heating as well as A/C supplier, plus I never had issues with him before. I guess that the Heating as well as A/C supplier has been going through a tough time, plus it must be affecting how well the Heating as well as A/C vendor is doing at her task of fixing Heating as well as A/C units. However, if the modern Heating as well as A/C supplier is not doing a superb task at fixing modern Heating as well as A/C units, she might end up taking a break. I am being expensed for Heating as well as A/C repairs that are not getting done, plus I can’t really afford to pay the Heating as well as A/C supplier no matter how awful the modern Heating as well as A/C supplier is doing. I want to call the owner of the modern Heating as well as A/C supplier, but I don’t want the Heating as well as A/C vendor to get in trouble. I just want our gas furnace to be fixed. I don’t want the modern Heating as well as A/C supplier to get in trouble because I guess she is having a tough time. I just don’t know how to approach the Heating as well as the A/C vendor. I do guess that I have to do something because I can’t afford to keep paying off the Heating as well as the A/C supplier while still having a broken gas stove . I hope that the Heating as well as A/C supplier takes it well.
Heating and cooling provider