Had annual maintenance performed on a 2 yr old uni...

Had annual maintenance performed on a 2 yr old unit installed by Jon Wayne. Technician flushed the unit but it didn't drain. His solution? Put more water down the drain, then investigate. When he checked the line he noticed a crimp was causing the water not to drain. His solution? Jon Wayne plumbing can fix that for you. He recommended getting them out soon to make sure the water flushes. Too late. Water had already backed up and water spots appeared on my ceiling. 30 minutes later it was dripping on my floor. I called Jon Wayne back to find out what to do and they said someone would call me back. An hour and a half later they did. By that time my husband had already driven home, fixed the crimp and found a gasket sitting on top of the a/c unit in our attic. The Jon Wayne supervisor immediately began telling my husband about the crimp issue explaining that his technician has advised me to fix it until my husband asked about the gasket. To the question shouldn't this have been on the unit instead of on top of it, his simple reply was yes. Problem solved, but not by Jon Wayne.