You may want to ask your dr. about Menniers Disease, vertigo, hearing loss etc... are some of the symtoms. They did the same tests on me and finally diagnosed me with Menniers which I have had over 10 years. The intensity of the disease varies from individual to individual. Good Luck.
I would continue testing and treatment with the House Ear Clinic. They are very good, and this is especially important because they should have a lot more experience with ear problems than most ENTs.
Most balance tests consist of the ENG test, a lot of ENT's dont have this equipment.
It could very likely be Meneires or Labyrinthitis, these are differentiated by the time the dizziness, fullness and hearing loss last. The specialists at the clinic will be able to make a diagnosis based upon history of symptoms and clinical evaluation.