I'm sot sure this is going to help but here I go,
my t is getting paid, yours is too, who cares if through you or state benefits or whoever, she has an obligation to provide a service she is being paid for. If you call her, she needs to call you back a lot sooner than a week later!! If not because she cares, at least because she is being compensated.

Also, I would let her know there are issues that for you are more important to address than your relationship with your parents. Tell her you expect her to focus on your needs and what is important to you, and that may be different than what she had planned for the session. If she is a good t, she'll understand.