You have severe form of GERD / acid reflux issue as per these reports. Diet and lifestyle modifications are the main stay of treatment. If not improving, you may need to undergo surgery like Fundoplication. But even then you have to strictly follow the advise. Consult a Gastroenterologist + Laparoscopic surgeon for further advise.
Health Tips
Avoid nonveg, spicy , oily food, coffee, alcohol and smoking.
Avoid sleep immediately after food.
Keep your head end elevated while sleeping.
Do regular exercise.