My brand new TT was wired out of phase ...

I just picked up (earlier today) a new Rega p3 with an Elys cartridge. And I was excited to plug it in and do some listening. Here's the problem: It seems that the thing was wired up out of phase. At least, that's how it sounds to me. And to my sweetie. My question: I'm pretty much blind, and there's no way in heck that I could deal with flipping the leads on a phono cartridge. And my girlfriend is, shall we say, no one's engineer. I asked her to describe the setup, and she told me that the white and the red wires are hooked up on one side of the cartridge (vertically). If memory serves, this would indicate that the shop wired the grounds on one channel and the live wires on the other ... I think. Am I right? (There's no central image at all, and I just cannot imagine what all else it could be.) If I'm right about what's wrong, is there anything that I might do other than getting the thing back to the store (an hour away from here) and having them wire it right? I'm not sure, honestly, what I'm hoping for. A phase-inverting RCA thingy? Some kind of voodoo phase prayer? Any help any of you could give a boy would be greatly appreciated. Thanks so much.