XY shifts are usually simply due to loose linear motion parts. It is hard to see from the pictures if the machine uses belts or screw rods. If it is using belts, tighten them as much as you can. The next step is to do a movement calibration test. Have your extruder make a spot on a piece of paper taped to the print bed, then move the extruder 100 mm using your interface. Measure how far the extruder actually moved. If you can get into your firmware you can alter the number of steps the motor uses to move a known distance.

Another point is that when buying a printer, be wary of ads written in Engrish.

Old Man Emu