Sonic Drive-In

I'm at Sonic at least 5 times or more a week ! The sonic around the corner from me has become quite awful! I've had to return my slush 5 times in the last month! When you call the 800 number NOTHING is done, it's like the person on the other end of the phone doesn't care! My orders are NEVER correct anymore but if I go to another Sonic my order is better! Sonic phone customer service sucks!