Wow, that sucks. It makes perfect sense why you would feel you can't trust anyone and/or that they always let you down.

I would keep my appointments with her in August. Hey, you never know..

But in the meantime, I would still try some of the other Ts. This way you won't be completely alone. If they are crap (substitute Ts) you can dump them but if they can, even if only in a minor way help, I'd say that's worth a try. What do you think?