I'm sorry to hear that...I think it's pretty obvious that the Vet put her on the wrong meds for both the Scaly-Face Mites and the Upper Respiratory Infection she has, which I don't think has a thing to do with the Scaly-Face at all...
I highly suggest you find another Avian Vet and take her to get cultures actually taken, or take her back to the same vet ad demand that the do the proper cultures to actually diagnose what type of URI she has, and then get her on the correct antibiotic, anti-fungal, or both based on the results of the culture...Also, I would highly suggest that you get her off of that topical anti-parasitic that isn't treating the Scaly-Face at all, and request that they give her a simply, single, one-time injection of Ivermectin based on her weight, because it will clear-up Scaly-Face Mites in a matter of a day or two..She would have been much, much better by now had they just given her the standard-treatment for Scaly Face, I don't know why the didn't, but she needs it badly...Scaly Face Mites are tough little mites, and Ivermectin is used as the standard-of-treatment for Scaly Face for a reason...plus putting a topical poison on your bird's face/head/beak/around her nares twice a day is playing with fire annyway, if it gets into her eyes she could be blinded, if it gets into her mouth or nares it could poison her. So a simple, one-time injection of Ivermectin is not only much safer for your bird, but it will actually kill-off the Scaly-Face in a matter of a day or two...