[Resolved]  Grofers — 1500 Rupees voucher used on 1160 Rupees order

I had ordered items worth 1160 Rupees and used a 1500 Rs worth voucher on the promo page for which I thought remaining amout would be credited to the wallet balance like every other site is expected to work, but I got no balance added and Rs 340 was scammed this way?
@Grofers

I would either want the remaining amount credited to the wallet or want my whole order refunded. Take your products back, I don't need them!