Workdrive won't add to Zoho One

Workdrive won't add to Zoho One

Hi there, 
I'm trying to add Workdrive to my Zoho One account but it keeps saying that it's not supported. The same is happening for Bookings.

I originally signed up to a trial for both these apps with a different email to the one that owns Zoho One. 
Perhaps this is the reason they won't migrate into Zoho One? I have tried to deleteoriginal email from any organisation accounts, but I'm still locked out from bringing the apps into Zoho One. 
Please help.