Mopar Action magazine DISCONTINUED
Of course you may do as you like.
You are aware that the entity that stiffed you, ownership at Harris Publications, has nothing to do with the current incarnation of Mopar Action? Some of the people responsible for the magazine's content are now employees or freelancers working for a new company. I'm certain they wish you would get everything you paid for.
If you paid AMG/Parade in that small window last year when they were accepting payment for M.A. subscriptions, I'd imagine it is still valid.
Also, I seem to remember that there was some sort of promise that AMG/Parade was going to make good on subscriptions made with Harris. Perhaps that avenue could still be investigated.
Well, I've gone from what I know, to what I think, to purely guessing.
Good luck to you.