To upgrade or downgrade your marketplace

1. Login on zon.tools with your amazon sign in.
2. See Login KBA
3. Go to My account.
4. Click Edit.
5. Choose the marketplace you want to downgrade or upgrade and click Upgrade|Downgrade.
6. Tick off Change Plan.
7. To change your plan, click Add to order.
   You are then redirected to the Checkout page automatically.
8. On Checkout page, you will see the Title according to your selection. Your plan will downgrade or upgrade.
9. Click Set Up My account Now.
   
   

https://support.zon.tools/1432-knowledge-base/3218-user-interface/12232-upgrade-and-downgrade-susbcripiton-marketplace