Madening throat pain from last one year.

Hi Doctor, I have more than 1 year left side of my throat inflammation and pain, sometimes it pains like hell. I had a benign tumor(vagal schwanomma) in neck with pain in throat,  that tumor suddenly arose in July 2016 and after several treatments it didn't shrink, so we decided to go for a tumor removal surgery in Gangaram hospital which paralysed one of my vocal cords(left one). Now my voice is very low after vocal cord paresis and not clear, I can't speak fluently at all. I have a persistant cough at my left side of throat and pain is still the same, as it was there before the surgery. I  contacted lots of ent specialists in this one year but no relief in sore and pain which is making my life hell, I cant concentrate on anyhing due to all these problems. All medecines(antibiotocs/LPR relivers etc) I was prescribed with followed by endoscopy seem to be temporary relievers andi that's the reason I feel helpless and losing hope in life. Seeking your help now.