What other 3-d printers can do a comparable print volume to the z-18? If i could find something better we would send this POS Z-18 back.

We have had it since early July and was only able to print with it for about 2 weeks before it messed up. A 4 weeks worth of emails went nowhere with makerbot support, they just quit responding, I've called them 4 out of 5 days this week and its still not working. I've literally spent 2-3 hrs on the phone this just on hold this week to get this thing working. Its having multiple issues and they cant fix anyone of them.