One has to be a psychopath to do that to a person who is suffering... But I can definitely see something like this happening in my country, too.
You could try driving to another hospital, or even coming back to the same hospital and demanding to be seen by an on-call ENT.
I guess you can try searching the net trying to figure out what this could be.
I just did a quick search, and came up with
http://www.livestrong.com/article/541956-ear-ringing-vitamin-b-complex/
"Although ear infections are more common in children than in adults, it is possible for a person of any age to suffer an ear infection. Possible symptoms associated with an ear infection include sharp or shooting pains, and temporary hearing loss or ringing in the ear. MedlinePlus states that infections of the outer or middle ear typically involve earache. Treatments for ear infections include corticosteroids for the inflammation and any itchiness, painkillers such as ibuprofen or acetaminophen to relieve pain, and vinegar drops to combat the infection."