For somebody that was there, you sure have your facts wrong.
They did not expire my viz (where did you get that info?) Why would they demand a hydro on the tank? At best they should tell me that the tank is due at a certain date and let me make that decision if and when I want to get a hydro. Of course they should not fill a tank that's out of hydro. That's not the point of this conversation.
Maybe they know me as scuba Jenny because that's what's written on the tanks.
Who tried to get a tank filled out of hydro? Where did you get this information? And since I left with all the tanks full, the shop not to be named is in a heap of trouble then for filling a tank out of hydro. Of course, that did not happen because the tanks are current with hydro.
Maybe you should delete your post before you look any more foolish.