It's sounds like this bunny has found her way into an excellent home
. It would be lovely to see a picture of her.
Although steroid use is risky in rabbits because it affects the rabbits immune system and can leave her prone to infection, they are very effective at reducing inflammation and can sometimes bring about a dramatic improvement in the tilt. Repeated doses are not advisable though, except in a life or death situation.
NSAIDs such as metacam should not be given at the same time as steroids, which is most likely why your vet didn't prescribe them at the time. She may be able to have them once the effects of the steroid has begun to wear off.
Just to put another perspective, my specialist vet usually advises to treat for e.c. as well as ear infection in cases of head tilt, as e.c. can strike whilst the bunny is weakened by the infection. My head tilt bunny does have a history of probably e.c. though. i would personally treat all in contact bunny for 28 days with fenbenazole. I have heard about the risk of bone marrow suppression from fenbendazole in some species but haven't come across it in rabbits as yet.
I agree with Sky-O that physio and massage is very beneficial for bunnies with head tilt, as is encouraging them to move about
I hope your bunny responds well to treatment xx