No warrantee.

The purchased an electrical blanket at the store yesterday. I came home and found that the slip was missing from my bag. I usually copy and file slips for items that have a warrantee. I called the store for a reprint of my slip. They said they do not have functionality for that and I warrantee is void. I have the credit card proof of purchase. The date and time of purchase so it's not like I am lying about the purchase but to be treated like a **** for an honest human error is just absolutely ridiculous.