Coast To Coast Carports, Inc Incomplete Building Instalation Knoxville Arkansas

The end of October 2014, Coast to Coast Carports installed a 24x20 metal building for me.  They brought the wrong size garage door with them, plus there are other issues with the building too. Was told by them that they'd be back soon to install the "correct" door.  Over half a month later now and I still have no door on the building. I can not use it or secure anything inside it.  I have made numerous telephone calls to them, most the time no one returning my calls.  Last contact I had they told me they have no idea when they will be back in my area to do any work.  In the meantime, I have fully paid for this building and it can not use it. They will not help me resolve this problem or arrange for anyone to come complete the installation. All I want it a door up like they promised me and were contracted to do!