poor service and \no cash"to refund """

I am shocked at the sorry excuses I received from staff at the campus Square store.i bought a shoe for my husband a few days ago and just checked with the staff if I could return it if it didn't fit as he wasn't with me at the time and they assured me I could return it for a refund. I went back today for a refund and was told I can't get one because they have no cash. They also have no gift cards. This is really not my problem, if your policy says you give refunds then I expect you to honour that, it does not say refund only if we have cash available. What pathetic excuses and poor service, I wasted time out of work, a drive all the way to the centre and left with the same item I don't even want. I am appalled! How is this acceptable service?