Big Bazaar / Futurebazaar / Future Retail / Hometown — discount not given on sbi fbb credit card

Dear sir,

I have purchased clothes from big baazar gorakhpur.
They have not provided the discount of 10% which is automatically deducted or refunded.
At the time they had said that there is some issue but not aware of the exact issue.
Also they have taken any initiative to write complaint to sbi for the same and get the discount amt reversed to me after some time.

Have you questioned sbi for plan b if the machine is down.
And such a big store was having 8-9 counters but only 1 machine?
I am surprised.

Request to look oito it and revert.
Invoice copy attached

Memo no: 0054746, dated 12/11/2018