Maybe I should not post this but I have completely lost my hearing in one ear. I have recently had cochlear implant surgery. The sound of the implant is poor, like a cheap transistor radio with a busted speaker. On the other hand I did get a BAHA (Bone Anchored Hearing Aid) demo and I thought that sounded very good. The BAHA uses your good ear so you would still have single sided hearing. I have never had traditional hearing aids because one ear is non-working and the other ear is quite good.
You should see an ENT and see where you are and go from there but from what I'm told (and I asked many doctors) there is no replacing the hearing you once had.