Netmeds — Only partially refunding money for returned medicines

Hi,
I have been buying medicines from long time now. From August 04, 2020 to September 05, 2020, I have returned some medicines because doctor changed some medicines and he stopped some medicines. While I returned medicines, Netmeds collected them immediately but for refund, they are not refunding money.

Total refund is 2933.58/-

But Netmeds has refunded me only 425.35./-

Everytime I remind them about refund, they either give some excuse like they are yet to get confirmation from courier partener or they give me irrelevant replies like they have added NMSCash 67/- for one medicine and 87/- for another medicine in my wallet which I can use to buy new medicines.

I told them they added only 425.35/- in my wallet instead of 2933.58/-

I have sent them scan copy of all return receipts but they are not refunding my money (2933.58 - 425.35) = 2508.23/-

I have also sent them all the details like date, challan number, order number, qty returned, rate, total. I have sent them everything. Still they are giving me irrelevant answers.