Autodesk does not permit products to be switched. 

You will need to disable auto-renew on the unwanted product and wait for the Subscription Term End Date for it to terminate.  Use the Cloud Marketplace to purchase the desired product (refer to ‘How to: Purchase Autodesk from IM Cloud Marketplace’).

You may contact your Ingram Micro Technical Services’ Autodesk Licensing Team to discuss your concerns.

Autodesk Licensing Team

Email: Autodesk-Licensing@IngramMicro.com

Ph. No: 1-800-456-8000 x 76027