What a inconvenience

I went to the campus store on Sunday to buy a voucher and the teller tells me they out of stock. Why I don't know. Yet I had seen a stack of the gift vouchers he had and he was scanning them. I walked out and I will never shop at clicks campus square again. I had to drive all the way to Cresta and get the voucher there.I don't have the time to drive around. Please can the campus square store put up notices to say they don't have gift vouchers. I wasted my time standing in the queue just to go to the till points and be told they don't have.