Disappointing customer service - Telling the customer to "have some patience"

Over the past weekend I visited the Game in Mall of Africa. I was interested in buying a desk and looked for a sales rep to assist me in checking if there is stock and obtaining the table for me. After waiting 20-30 mins for someone, I approached a consultant who told me that the person who can help me is busy. At this point there were 3 consultants standing and talking together so I asked if one of them could help . . .which is where this interaction went wrong.

The consultant told me that the person is busy and that I should have some patience. I told him that I've been patient and was just looking for some assistance, to which he rep****: "There are other customers waiting too". I explained that that is a staffing issue and cannot be my responsibility and I walked away.

As I was walking away, he turned to another consultant and said that I have a bad attitude. I returned to him and explained that I am the customer in this interaction and that he should be better.

We went to another store to purchase the table (and the rest of the items we were looking for).