["You're using that piece of crap again, Naz." Samara said and I smiled. My full name is Nazilla but most people consider that a mouthful.]
If there’s a speech verb, it’s not considered the start of a new sentence, so there should be a comma rather than a period inside the quotes.

The Machines, The Net...this sounds a lot like the plot to "Terminator", with odd elemental aliens tossed in there. I suggest you work on your worldbuilding to make the setting unique, as man vs machine is a cliche enough scenario to stand on its own.