Wanhao Duplictar I3 3D Printer Problem

So I bought a Wanhao Duplicator I3 2 weeks ago and it never made a successful print since. The sample print that came with never finished printing because the extruder stopped feeding the filament but the printer thought it was still printing so the extruder just kept on moving about. I tried printing through Cura but the printer just refused printing the innards of the object so they were very unsupported. I am very frustrated with this right now and am looking for a way to fix this. If someone could please help me I'd be very grateful. The picture of the failed test prints are below.
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