

make yourself into the biggest pain in the arse customer & be an obsessive nuisance caller - until they treat her! tell the receptionist she needs a customer care course & she can start by sucking up to you & if she hasn't got any positive interpersonal skills or diplomacy to find a job as a politician or a job where she doesn't deal with customers! she sounds like she has the mentality of a plank with charisma to match!
tell the vet too when you see them that the receptionist was rude etc - they may not be aware & discuss/rectify the issue with her
tell them it's an animal welfare case as she sounds like she needs painkillers for one. have you got any probiotics for her you could put on her food/feed her? that may help with the diarrhea. hopefully its not burst or become infected as that complicates things somewhat, she may need antibiotics or unfortunately an operation if it has come to that.
is this the only vet you have that will treat her locally - i know its a bit few & far between for vets in Canada & the USA - could you get a second opinion/change vet or is it not possible?

its good that she's still eating & drinking though that is definitely a positive sign

just make sure she's eating enough continually if she is having lots of veg/greens this may make her diarrhea worse, but she needs to be eating, bit of a rock & a hard place situation

if she is eating plenty of hay & nuggets for the time being let her eat more of them if she will & gradually increase the greens again when her tummy is more settled.
fingers crossed & heaps of healing vibes for Callie.
keep us updated
xx