The filet I bought for beef Wellington isn’t the right shape. What do I do?

I’m making dinner for some friends and meant to do a beef Wellington, but the filet I bought is a weird shape and frankly is kind of suss all around. First of all, instead of being compact and cylindrical, it’s got these four weird kind of ”appendages” and what I swear to god look like ears. And the silverskin isnt so much silver as it is…furry. It’s also pretty quick-moving and meows. It scratched the shit out of me when I tried to wrap it in butchers twine. I think it might have gone bad though idk I’m not really a beef person generally. Anyway, what should I do?