REFUSES TO REDEEM KA-CHING VOUCHER

This morning i received a Ka-Ching voucher via sms , so i go to the KFC less than 200 meters away from my office to be helped by a cashier in redeeming my voucher , then the manager comes to the front and says to me , that i cannot use those things here & i must now drive 20 km away from the KFC i am currently standing in to go redeem my voucher at the Beachfront KFC as they DO NOT REDEEM these vouchers , after she had said this to me i had told her that how is it possible you do not redeem the vouchers sent via SMS because i have used 3 here previously that i had been sent! i Then get told that i dont know what i am talking about and that its not her problem it is mine, i find this service horrible, why have a promotion running then get customers turned away by lazy staff who dont feel like going through the trouble of helping a customer , i had said to the manager what sense does it make for me to spend R50 fuel to drive to a store 15-20 kms away for a voucher worth R20? i then get told well thats your problem isnt it. GREAT SERVICE KFC ! Will not be going back!