You really need to copy the post you did and email it to the shop. The young lady who helped you is a serious detriment to their business and unless they are made aware of it, it could seriously affect them, and their other employees who probably depend on their jobs. Be sure to include the day and the time you were in the shop so they can identify the employee that was helping you.
It may seem harsh, but in today's economy every business needs a "helping hand" to stay alive.