I'm angry on your behalf. As though you didn't have enough to deal with!

I think you should answer, tell them "not interested, thanks; don't call again" and then hang up. Then you should tell your doctor's office the same thing. I find what you described suspicious.

I wouldn't sign anything saying I would accept "all" medical treatments as a blanket statement, either. Medical care is, and should be, a very personalized thing - what works for you may not work for me - especially when dealing with a syndrome as complicated as TOS.