Steak 'n Shake review: customer service/milkshake

I went to purchase a milkshake at the location 2205 Grapevine Mills in Grapevine TX. I sat and waited for what was an unreasonably long time for a milkshake. I went to the bathroom, and when I came back my milkshake was not there. One of the waitresses told him i had left, (I didn't). Waitress asked where it was and he told her loudly "she just gonna have to wait" and continued ranting and raving. I asked for a refund which was another long process and left. The atmosphere was extremely unpleasant and unprofessional minus the waitress that took my order. If you don't like working with people the morgue is always hiring. Needless to say I'm done giving them my business