My 30 day trial of Office 365 expires tomorrow July 10th, but I never tried to use it. Now I have purchased Office 365 Small Business Premium and am trying to but cannot use it. When I enter the product key on the purchased product I get the error message in the subject heading above. "Manage and purchase licenses" shows that I have only one subscription, Office 365 Small Business Premium Trial, and it expires July 10th. What should I do?