Rewards Vouchers will fail because of consultants

Went to the branch to make a payment and than to purchase a few things. There was a lady who previously came to the counter and went back to look at a few more things, the cashier called her to the front of the que. Anyway after waiting for their chit chat, finally we arrive at the desk, she failed to greet i mean come on even my son knows the basic of saying Hello, so i asked her to check if there's a voucher i can use, she ignored me and tilled the stuff after giving me the receipt i asked again and any vouchers? No just one if you spend R300 nothing more no details, my purchase was over R250 i could have bought something else to use the voucher. No smile no apologies nothing. In retail good service is paramount here its a fail dismally!