Sonic Drive-In

I initially gave my order for three shakes at 8:13pm. There were four vehicles in front of me. I got to the pick up window at 8:24 pm. The employee read me my order which was incorrect. I received my corrected order with a higher bill total at 8:37pm. Only one of the shakes was satisfactory. Another was not mixed and all of the caramel was at the bottom. And the last one was Oreo with absolutely no chunks in it. It was like Oreo dust. I asked why they were so slow and was told a couple of people had quit and they were understaffed. Probably my biggest complaint is the fact that the person at the window handling dirty cards and money stopped to make shakes. I frequent this particular Sonic an average of two to three times a week. This experience may have me looking for an alternative fast food restaurant.