As a good friend of a Veteran of the Staples Wars let me give you something to try.
If your order was cancelled try calling it in via a CSR versus doing it online. Staples does have some very friendly CSR's - if you are lucky enough to get one.
If your account has been flagged, call the Office of the President of Staples about it.
My friend has done every kind of Staples deal imaginable and has not had her account flagged yet. One thing I think that helps
is if you are a dividends customer. She has also had things delivered to big Staples customers when they were out of stock in her area so that might enter into the equation as well. She has had deals delivered all over the US so that might also disperse their concentrated attention.
She has several different account numbers with them but all with the same address and phone number. I wonder if she got the ban on one of her accounts if all would be flagged.
If Vladik can place 9 orders with a dividend code on a weekend night and not get banned then there is hope for you yet