Suggest Treatment For Ringing Sensation In Ears While Recovering From Fungal Infection

Question : About 6-7 months ago discovered a black powder in my left ear. My Dr told me it was a fungus that naturally occurs in the ear and gave me anti fungal cream self administered via syringe and catheter. This appeared to reduce the problem but I developed a high pitched whistle in left ear, and I was advised by DR to use olive oil. About a month ago I caught a mild cold, took panadol flu and cold and I was fairly fine. My cold symptoms seem to subside but my eyes were itchy and running nose, no fever. I eventually realized it could be hay fever as I live in a dusty environment and took antihistamine which seem to clear the problem. I had just resumed scuba diving, practicing in a warm pool, I had dived week before, no problems, this time I gagged twice underwater and was in bed for two days, I thought could be middle ear infection compounded by uncorrected vision I'm +3 both eyes. My DR gave me Stugeron and told me to continue with olive oil in my ears. I thought I also needed antibiotics which you can buy here without prescription remox 500, I also bought myself some eardrops waxol.
I feel about 70% since that dive in the pool. I still have to lie down in the evening and still have that annoying intermittent ring in my left ear. A horrible taste develops back of tongue which makes me eat to remove, sweets gum etc. My head feels light headed, no pain just dull. I am also overdue for an eye test so that will be my next step. Regards XXXXXXX