One email address, two apple ID's
I am getting an error when trying to verify my email address. The message suggests that I cannot use that address as it is already linked to another apple ID. I have used my email address as the apple ID, and on a separate occasion, was able to create a separate ID using that same email address minus the @emailprovider.com. This is preventing me from verifying my email, in the process of setting up my icloud account.
iPhone 6