Vevor diesel heater. 100% JUNK!!

I followed all the instructions and watched all the videos. Manually primed the unit. Hit start nothing but diesel fuel pouring out of the intake and exiting. Contacted Vevor customer service and tech support 10 times they responded they had no suggestions or were willing to give support. They told me to contact Amazon it was their problem. It’s brand new (Christmas present). Horrible company and horrible customer service.