Bushnell first strike - Bushnell First Strike Illuminated Red Dot Sight

I bought a Bushnell First Strike for a 22 S&W When I mounted the red dot I couldn't find the red dot in the reticle finally I had to lower my my head about 6 inches to find the red dot. I contacted Bushnell and they told me to send it back an when I received it back it was still like it was before. It is sighting about 40" high I called them back and they told me they had problems with this model and the best thing to do was put a piece of pop can under the back and that should make the red dot come down. They didn't offer to repair it again or replace it so as of now I will no longer purchase any Bushnell products.