Reliance Trends — item is charged three times in bill

Yesterday we purchased some clothes from reliance trend, international tech park, whitefield road banglore. I took the items to home and by chance i checked the bill, i Was shocked to see that one item is charged three times . I called to store and mentioned this, they again and again asked us to bring bill there but as we can't go there to solve this issue. We told bill no. to manager also but he is not able to solve our problem . Why sHould we bear our loss. I have highlighted item in bill. Kindly look into matter ASAP