it happens unfortunately. brittany spears went and got her puppy from a pet store. impulse buys.
If you can't get your money back then you take that puppy and enjoy the hell out of him. Lots of people here have puppies from places they didn't know any better about. some are perfectly fine, some have minor problems, some have major problems. nothing you can do about it once you have the puppy. just love him and spoil him.
Now that you are on YT and you are learning you'll be able to get your female from a better place whenever you decide to get her.