After 6 minutes, I'm told "we have other calls wai...

After 6 minutes, I'm told "we have other calls waiting, let me have a call-back number where you can be reached", which is completely unprofessional. They obviously don't listen to a word that is said because they can't correctly repeat back what you said. A worst of all they constantly interrupt you in the middle of speaking. If you want to get anything accomplished, you have to stoop to their level.