raw cumin seeds help in acidity.  try 1/2 a teaspoon . tried and tested remedy with immediate  reluef in 5 mins

i m also suffering from the same problem. in my case I took the vanilla incream (do not eat fully chilled keep it out for 5 mins and den have it) and cold milk. it works for me u can try it

have digene mint flavour syrup its helped me out twice a day after meal and also have ajwain wid black salt... have some walk aftr meal