Buffalo logistics is the worst courier service

The worst possible courier service I have ever experienced in my life. I am trying to reschedule delivery after I already requested them to contact me instead of my 11 year old child. You can't even get hold of them ! I've been calling for days you sit on the ohone for hours when you get to the front they cut you off. I have even sent emails asking for assistance it's been a week no assistance whatsoever.