I think you should go to another doctor for a second opinion. Since you are experiencing hearing loss, then there's something wrong. More tests should be done on you as well. If you can, try out those hearing loss treatment centres as well, they can surely help you. Don't stop seeking the answer for your condition, I'm sure an expert can diagnose you correctly.
I did have tonsillitis and hearing loss when I was younger. However, it was always temporary, whenever I have colds or coughs, that's when I experience hearing loss. Fortunately, as I grew older, the condition went away. I think it has to do with the adenoids blocking some part of my hearing system. I cannot recall exactly the explanation for it.
Your case is different though since it isn't temporary anymore. I hope you seek treatment and find some relief for this. Good luck and take care!