hello and welcome to HCM,
Let me first console you by mentioning that in all probability the doctor who performed the surgery wanted to clear your infection from the ear and first make you safe and only then worry about your hearing.
Unfortunately since you have mentioned that all the bones were destroyed and subsequently removed and also since it has been so long that the surgery was done, it is likely that the nerve
of hearing has become weak and thats why you have the hearing loss.
A nerve once it becomes weak can usually not regain its strength as its recovery capacity is very limited.
You need to first find out by performing an audiometry
whether your nerves are weak or not. If you have a conductive hearing loss
or a mixed loss with good air bone gap then you may still have a chance for regaining hearing after surgery but this chance is remote. If anyway the audiometry demonstrates neural loss the unfortunately your only hope is a hearing aid
get back to me with the reports of the audiometry and we shall see if we can help you out further
Dr Sriram Nathan