Wellcome to healthcare magic. According to your description, I thought you have sinus infection
due to Deviated nasal septum
or any other mechanical obstruction in the nose. So you have to consult any ENT specialist
who can do nasal endoscopy to find out the cause of your sinusitis
. Nasal and sinus infection can cause negative pressure in the ear which leads to decrease hearing, buzzing and dizziness. Once nasal and sinus problem will be solved, your ear problem will be also solved. Have a speedy recovery.