See office.com/renew.
Select the subscription you would like to rekindle.
Choose subscription plan depending on your need.
Then Inspection your shopping cart and then click check output.
Now, Microsoft account page looks in your screen.
Login to a Microsoft accounts by filling correct Username and Password.
After that, examine your purchase and click on"Renew subscription".

If your charge card isn't accepted by Micro Soft billing accounts adding a fresh charge card or upgrade your own charge card on Microsoft billing account and then repeat our following steps to renew Office 365 or simply make a call at +1-855-999-4811 charge card. Microsoft customer service number provide the best service for our customer. Microsoft customer care phone number well resolves your problems and it is a group of qualified people

more info:http://800helpnumbers.com/microsoft-support-phone-number/