I have cylinder #2 misfire… replaced plugs and coil pack , with after market coil pack, still not running correct … new coil pack bad? Or do I need to replace coil pack with Mazda coil pack?

First, sorry to say, but I'd never use aftermarket ignition components. Go original Mazda to eliminate any doubt. Did you perform a base engine compression test to ensure the engine does not have some kind of internal concern? Use this link to find some shops near you that can help with your concern: www.repairpal.com/repair-shops