Walmart App not letting me sign in?

So I recently started working at Walmart in OPD (fun but my feet hurt), and I wanted to use the Walmart app (not me@walmart), but every time I try to sign in, it says my phone number is linked to a different account and I have no other phone number and I've never used my number on Walmart, is there any way I can fix this? if not, what should I do?