I think that might work a little differently since there's an associated contract/service, rather than just Best Buy selling you a product? (also, how many items did you return, if you don't mind me asking? I'm a little curious what the "limit" is) If not, you might want to find a corporate Verizon store and see if they can help. I'm not sure since Best Buy was acting as a Verizon-authorized dealer, but the corporate store might be able to at least explain the process for Verizon and what Best Buy should do if applicable.
I've dealt with AT&T more, and I know that they typically do the "buyer's remorse" window for a few different scenarios. I paid off two phones early on our account (they were done with Next), and had to wait 2 weeks for that window to clear before they could be unlocked. Verizon might have something similar for new contracts.