Poor return/repair policy

I purchased a brand new My Passport Ultra directly from WD. It failed and did not work and I had to return it for what I thought was the same brand new product but a working model. What I got was a “replacement drive.” For all I know, the “replacement drive” is an old refurbished model. How do I know it’s worth what I paid for the brand new one? I’m very angry about their return policy and now very distrustful of this company.