Samsung tried to reap me off

My name is Tsekiso Ramahalane. I have a NP300e5e-A06ZA laptop. In November 2014 my hard drive crashed and i sent it in to be repaired, Service Number: ***, they repaired it in 4 days. But they downgraded my 750gig hard drive to a 320gig and my already little processor from a 2.6 to a 1.1, they basically turned it into a A01ZA model which is a cheap 2999 thing, bet they thought I'd be too dumb to notice, this is only the things i noticed.. I sent it back to them within a week of getting it back the first week of January and it is more than a month now they've had it and aren't giving any feedback and can't get them on the phone. Might be their techs are ruining a **** reaping customers off.