I would take it back and let them have a go at fixing it, its a pain not to have it for 2 or so weeks if that long, but give them a chance to fix it. With all the faults that seem to be wrong with it I would say if you do get it back you will be lucky if it works right, then take it back and demand a refund.
Try emailing Acer direct to see what they say, you should get a reply in a day or two. Let them know all the problems with it they should tell you what to do next. Ive only used Acer returns once and they seemed ok, that was for a TV which they collected and returned with in 7 working days.