Alright, so I bought this steak on the 18th. Immediately stuck it in the freezer. I had two different packages of steak. They both have the Sell By Date of the 20th, being the 24th I'd expect them to be good. One is still pinkish, while the other package has turned brown, like a cooked steak, almost. Does that mean it's bad? If it's still in the original wrapping and I have the receipt can I return it, if it's bad? If not toss it? Thanks!