Pain in upper abdomen. To heal complete.

From December 9 my mother is suffering from stomach pain. In January 2021 endoscopy done. And it shows antral gastritis. And after that she is taking pain killer and gastritis medicine. In march 2021 one more endoscopy is done. It shows antral gastritis with rut +ve. All the reports are normal from ultrasound and blood reports. Only endoscopy shows antral gastritis with rut +ve. And the treatment starts. 14 days course of Pantop HP kit was done and after that she is taking pantoprazole till now. Only burps are gone but there is no relief with pain. Diet : Cabbage juice, pomegranate, yogurt, apple, banana and simple food. Spices are avoided. Please suggest us what to do. And how long does this take to heal complete.