Diarrhea due to infection from an year.

Plz help me ! Ever since I came back home after the covid outbreak I had repeated bouts of diarrhea and indigestion. The stool reports showed Amebiasis and Giardia infection. They recommended me antibiotics which didn't seem to take any effect on the condition. Later they switched up the medicine with metro ornidazole and ciprofloxacin. Which made me a better temporarily. Later that too didn't cure the condition completely. I Was loosing a lot of weight as well due to diarrhea. Tinidazole was recommended which had the same temporary effect. They even extended the course but nothing seems to work permanently. I have dropped down from 46kgs to 29kgs in mere 8 months. I do not know what am I supposed to do now as I have visited multiple doctors and have had multiple tests taken. I have tried almost every kind of antibiotic till date. Which includes - Tinidazole , ciprofloxacin , ornidazole, metro ornidazole , albendazole. .