Oh, and when your mom calls (this is the part that might be rough for ya'.) Tell her "No." Explain someone's being paid for it, they need to do their job, if they can't, than she needs to call the service, and let them know the worker assigned can't make it, and she needs a different worker.
Don't take responsibility for ANY of it. It's HER mess, make her straighten up the room. "Tough love." (I'm guessing you've heard that one before...) Don't make the calls, don't do their job. Just tell them "no."