Wow you paid a LOT of money
. Is this a dog that you plan to show? I'm not sure I would pay that kind of money for a pet quality puppy.
Is this a breeder that you found on YT? I don't think that I have ever seen a puppy on YT that was priced that high.
Not sure how to handle your situation but I personally would never purchase a puppy from a breeder that I could not meet in person, visit with the puppies and see the parents. There are way too many shady breeders on line that make certain precautions necessary.