I'm really surprised that you are not the least bothered that you got a 1 GH/s machine and not a 1.2 TH/s machine.
AMT should still owe you 4 months worth of MPP, plus a faster machine.
Its not 1 GH/s, in the picture you can see that it can go 1TH/s+ . I'm not sure if I can change it or if I will even bother as 6 months was WAY too much time to wait for it to arrive (it was supposed to be here in February at the latest). I will contact AMT and see what they say about this.