Cintact,the company directly. They should be able to direct you.

What doesn't work? It won't draw liquid in? It won't fill completely? The handle won't move? You didn't give me much to go on here? Probable vause is the silicone o-rings are either bad or adhered to the syringe. Try backing it all the way out and see if that will straighten things out. I bought 2 of these and the both work great. We injected 300# of beef without issue, but our injection liquid was pretty thin.