Staples Staples denies picked up order even with credit card transaction number, refuses rebates. Framingham, MA Nationwide

Item was purchased on 2/9/2017.  I called as soon as I got the notice which was 2/21/2017.  I was told "Not a problem", we have found this order, we will update your file, we will get this processed

I've been denied again.  Same information, stating nothing could be found with credit card transaction number.  Item was paid for online, I went to store to pick it up within an hour.  I've been told credit card transaction number cannot be located.

Store denies I ever picked up product even though I have signed a receipt stating I picked it up.

There is an "easy rebate" of $40 on this item.  Staples is denying payment for this.  I don't have time to babysit Staples so they can do what they need to do for customers which is process their rebates.