Reliance Trends — Unable to exchange my top with the low price

Address:

Gopalganj

I have purchased clothes from Reliance trends for Rs 6404/ on 12.04.2024 and after discount of Rs 2000/ I have paid Rs 4404/. There was an offer of dicount of Rs 2000 on purchase of Rs 6000. Now One top with price Rs 799/ I want to exchange due to size issue, but they are not giving me xl or xxl size which I required. when I selected other top of Rs 699, they are demanding Rs150 more. why will I pay more because I have already paid Rs6404 which is Rs404 above from discount price. I have left that top in shop due to this type if service and injustice policy. my phone no is [protected].