It's like sending someone at work an email with three questions, sometimes they only answer one, maybe two questions if you're lucky. You never get answers to all three questions. (Yes it's nice to be retired now!)
So when I take the MH in for repairs, I always provide a written list of what I want done. This is especially true when they have to pay attention to details like use the owner supplied oil and fuel filter (laying in the passenger seat) but the shop is to supply the air filter. Sometimes I even send them the list by email after I've turned in the MH in case they loose the copy I brought in. I also make sure the list has all of the various ways to contact me if there's a problem or question.
Then before I pick it up, I call them to make sure it's all done. Even after that, I've still gotten there and something wasn't done. All you can do is try....
Bill