Oster 6329 2-Slice Toaster

Toaster worked O.K. for 2 weeks, not up to the Oster name, but O.K. I threw away receipt and box. After all what could go wrong with a toaster? Toaster immediately started malfunctioning. Will only work on bagel setting. I checked the warranty. It is valid for 1 year but it requires proof of purchase. It's possible the Target store could provide that, through my credit card number. However, is it worth trying to get Oster to repair it? I'm no toast connoisseur but...The heating elements aren't up as high on the sides as normal toasters, so it doesn't toast the top of normal sized bread. It toasts unevenly. With the same setting, the bread will come out darker or lighter than the time before. One side of the bread will be darker than the other side.