You don't get it dude. They are the ones who are not following the required legal process.
No, YOU don't get it. They have (allegedly) done wrong. YOUR remedy is to go to court and get a court order. You just don't want to do that.
I asked what allows them to refuse a subpoena and no one can come up with anything.
Because nothing ALLOWS them to do it.
Again, they have (allegedly) done wrong. YOUR remedy is to go to court and get a court order. You just don't want to do that.
Anyway back to the subject at hand, a valid subpoena was ignored without a legal reason. So who is not following the legal process?
If, as you allege, they have wrongly ignored the subpoena, the burden falls back on you to go to court and prove that they wrongly ignored the subpoena. That's the remedy part of the "legal process."
If you don't avail yourself of the remedy part of the "legal process" they can continue to ignore you with impunity.
If you aren't getting that yet, I suggest you consult an attorney.