Create a new discount coupon for service recharges.
Uppercase alphanumeric code with no spaces
Optional description for internal reference
Choose between percentage or flat discount
Percentage value (1-100)
Maximum discount cap in rupees (optional)
Minimum recharge amount required to use this coupon (optional)
Maximum number of times each company can use this coupon
Select companies that can use this coupon (at least one required)
Select service types this coupon applies to (at least one required)
