To cancel your SUITE subscription, you can refer to the steps in this guide.
If you wish to remove your credit card details too, you can head to Billing Dashboard by clicking on the credit card icon in the top right-hand corner of your page in Talenox:
NOTE: Only a Super Admin has the access rights to the Billing Dashboard page.
In Billing Dashboard page, click on "Go To Payment Information" under Payment Information section.
Scroll down the page until you see "Your Credit Card" and click Remove.