Hi, thank you for contacting JustAnswer.com. My name is Russell. I will do my best to provide the right answer to your question.
I think that, unless some point of assembling it was neglected, you probably have a defective product. Given that it is this new, and defective, then it would be best to return it to the vendor or store as defective, for an exchange with another of equal or identical value.
(The sound of the problem is that of a defective motor perhaps - a fairly expensive thing to replace. And that diagnosis is not sure at this point, I must emphasize.)