Were is my Venue 7, 3 weeks old,4 weeks being serviced???

The camera went out on my new,3 week old Venue 7.Sent it back for warranty work 4 weeks ago.Was told camera part was on backorder,wait,wait then told 10 days ago they would issue an exchange.Were is my Venue??Is it being built by little elves somewhere??I am getting so,I just want a refund for my $150.00.DELL,sure not like it used to be!dispatch number 171942792,al