Walt Sam

My new Affinity will not eject shells. It was sent back already because the fore end didn't fit into the receiver properly. Is there a quick fix I can try? I really want to use it for turkey season and doubt I will get it back in time if I send it in. I went thru a box of 2 3/4 high brass to see if the spring had to be broken in and that had no effect. Some jam and most push the spent shells back into the chamber. HELP