Went directly broken

I have this pump once can use successfully. The second time they broke, she could not compress more air. So I annoyed the pump and with the will they put up to repair and you could see that the rubber plug was pulled down inside the piston of the handpiece. And I've pumped my opinion quite normal. So I wanted to fasten the rubber stopper again, because this was only very loosely plugged and seal the pump. She has, however, taken no more air from the outside, but only the air that has previously pumped in step in the tire.
Conclusion of the action: absolute bad buy