iFix India - Poor quality battery used for replacement

I got the battery of my iPhone X, replaced about ** days ago. IFixIndia replaced it quickly, but used some cheap battery with discharges within * hours. I shared pictures/data to prove this. They replaced it with another one, which has the same problem. I asked for refund and they have stopped responding to me. Later I found out that this company is irresponsible while they claim to be premier repair center for Apple products. The service technicians and the sales and customer support have been well trained to answer the question “Do you use original components?” They use cheap components and dupe customers in name of replacing faulty components with “OEM original” battery, components etc. I have proof in the form of emails with attachments of pictures that show poor performance of the battery as well as my follow ups and their lack of response for over a week.