Need proper suggestions abdominal troubl

My sister at kolkata she has been suffering from gas, acidity, severe heartburn, throat burn , gerd, stomach prblm, continous burp etc. She took allopathy medicine but if she left those med within 2/3days all symtoms come. She is become irritated and stressed about this prblem.she burps all the day and bloating it's there. From last 15days she takkng robinia q, abies can200, acid phos200, arseni alb200. Bt symtoms doesn't improve too much. Heart throat burn and acid coming up still there with gas. Doc says 3month have to take medicine. My question is within howmuch time she will see min improvement? Will it purely cured from root cause? Her prblm is recurring so she is stressed। She is under healthy lyf style manganet from last4month । No spicy food, doing yoga। Plz help her।