Email registered under different organisation

Email registered under different organisation

Hi, 

I abandoned the process of registering a new account half-way through, but not before using a key email address. Now can't import this email address to my original account.  I am receiving the message " The email address is already registered with another account which is not a part of this organization."

Because I didn't complete the second account registration (because the number I tried to use was already registered under my original account), I can't delete it.

Can someone please help?

Many thanks,
Panos