every time you call it back it is busy weird

Caller id. Says beeline web ser

I received several calls from 215-344-2131, it's from Huntington V PA, Amazon.com, but I submitted my phone number to amazon via email because I am interested in partnering my business with Amazon.com, they simply returned my call to explain how to start selling your products on Amazon.

I take back what I said about the phone number 215-344-2131. They actually are a marketing company called "Four Walls Enterprises, Inc. and claim to work with Amazon, like build websites and get you set up to start selling on Amazon, they charge $499.00 for their services, but I need to call Amazon customer service and see if these guys are legit.

They're not legit because a real business Web or business phone listing would show up on the number search. If you don't believe it try it with a business phone number  you know to be legit.