Are you seeing a rabbit savvy vet? Not all vets are rabbit vets, and not all rabbit vets are good ones.
Did the vet verify an ear infection(pus in the ear canal, xrays verifying infection in the inner/middle ear)? If so, you should know that baytril is not usually the best antibiotic for ear infections and most often isn't effective as it doesn't penetrate to the site of infection. Some better ones might be injectable penicillin, zithromax, chloramphenicol, etc. Usually it is inexperienced vets that automatically prescribe baytril for a confirmed ear infection because of it's safety in not disrupting a rabbits digestive system, but it's rarely the most effective antibiotic for treating infections in rabbits. Sometimes though, if an ear infection isn't confirmed, baytril will be prescribed as a broad spectrum antibiotic to cover the possibility of infection, but if this is the case then the rabbit should also be treated for e. cuniculi, which I will discuss below.
http://www.medirabbit.com/EN/Neurology/Otit/otitis.htm
The anti inflammatory that was prescribed, is it meloxicam? What dosage did the vet prescribe? Inexperienced vets will often under dose this to rabbits. Rabbits metabolize this much faster than dogs, so need a much higher dose, usually 0.3-0.6mg/kg, and up to 1.5mg/kg short term. So if your bun is receiving too low of a dose, it might not be providing the necessary relief.
http://vgr1.com/metacam/
If an ear infection wasn't verified from finding pus in the ear canal or through xrays, did the vet rule out e. cuniculi as a possible cause for the head tilt, and if so how? Aside from an ear infection, e. cuniculi is the other most common cause of head tilt in rabbits. Because of this, if a vet can't verify the cause of the head tilt, then most experienced rabbit vets will treat for both an ear infection and e. cuniculi, with the medications Panacur(fenbendazole) to treat e. cuniculi, antibiotic to cover a possible ear infection, and meloxicam to reduce inflammation and control pain for both possible causes. When either disease can't be ruled out, any vet that doesn't cover these two possible causes, I would question how rabbit savvy they are.
http://www.bio.miami.edu/hare/tilt.html
http://www.gwexotics.com/wccms-resources/a/5/0/e/77554b90-a660-11e0-a685-0050568626ea.pdf
So if you aren't sure that your vet is a rabbit savvy vet, I would suggest looking into it and finding a rabbit savvy vet if yours isn't. Receiving the correct treatment can make all the difference in a successful recovery. If your vet is rabbit savvy, it would be good to discuss possibly changing to a better antibiotic, upping the anti inflammatory dose( in
very severe cases, considering steroids, but only as a last resort as it affects the immune system dramatically), and/or starting your bun on Panacur to cover the possibility of e. cuniculi.
http://rabbit.org/vet-listings/
I am in no way suggesting your vet isn't savvy or that your rabbit isn't receiving the correct treatment. But if this were my rabbit, these are the things that I would be considering and want looked at, and based on the information you provided, I would have my doubts as to the vets rabbit savviness.
Aside from vet concerns and medications, because your rabbit is rolling and having difficulty, you will want to keep a close eye on food and fluid consumption. If your bun isn't eating and drinking enough(starts losing weight), you will need to start supplementing with syringe feeds. Oxbow critical care mix is what is commonly used to feed sick rabbits who either stop eating or aren't eating enough.