I feel for you.
I used to work at a vet clinic and shocking it sounds spot on from what you have described. (different area though) I'm really not sure if the receptionist should be telling you what to do on antibiotics.
It's to bad their is not another vet near you. They sound awful. And the fact that you were on hold that long and have to keep telling who ever else answers the phone your question over and over again. Would simply just make me hang up.