Dabur Hand Sanitizer seller Flipkart - Invoice amount is more than MRP

I had ordered one Dabur Hand Sanitizer to Flipkart through order I'd OD******************;
They sent me the paid product on **.**.**** vide invoice no.FAE*********** where in the invoice value of the product is Rs.***/ where as the MRP of the product is Rs.***; I checked and informed them immediately and asked them to resolve the same. Since they took too long time the undersigned compiled to purchase another bottle of sanitizer as it was required by me on urgent basis. But it seems they are forcing me to keep the same. But as I had purchased recently, I do not have any requirement of their item, and I asked them to return and Refund my amount.
Kindly take up this matter and give me justice.