I have seen doctors, neurologists, ENT and no one can help me. I have been dizzy for over four years along with constant acid reflex. What is wrong?

Chronic vertigo/GERD. If four years of specialists in person can't figure it out it is unlikely there will be additional relevant input here. I am sure your docs have reached some consensus opinion about your problem and have given you a precise diagnosis or at least named your malady. Chronic "dizzy" and gerd are not that unusual.