Unfortunately your experiences is exactly why the Ruger 10/22 is so popular. The Ruger is cheap, easy to strip/clean, very reliable and has high capacity magazines that actually work.
Best of luck I hope you get it all straightened out.
I am glad to see Mossberg was willing to help though.
The number one cause of death in the 20th century. 290,000,000 citizens were first disarmed and then murdered by their own governments. This number does not include those killed in war.
We're from the government, we're here to help