Merchant creates 4 BOGO coupons:

₹2,999 → Gift A at ₹1

₹5,999 → Gift B at ₹1

₹9,999 → Gift C at ₹1

₹14,999 → Gift D at ₹1

If a customer spends ₹14,999 or more, all 4 coupons currently apply.

Desired behavior: Only the highest-value gift (Gift D) should apply.