1. Cancel the checks/have your credit card company cancel the payment to the place you purchased the piece of poo.
2. If you have Apple Care deal directly with Apple.
3. Do not be surprised if the idiots who sold it to you not only used an inferior HD they installed crappy RAM. Failing RAM mimics everything including neurosyphillis. . . .
MacBookPro 2.8 GHz Intel Core i7, 16 Gig RAM, 10.8.3--"Okay . . . I will try Mountain Lion!"
Fear Me! FEAR ME!
His secrets are not sold cheaply.
It is perilous to waste his time.