How to downgrade from paid to free?
In the billing page, click"Subscribe", your plan will downgrade to free next month. Before that you still get access to paid feature.
How do I view my billing details?
Billing in the upper right corner can view the current subscription and billing history.
Because Shopify has a capped amount. Sometimes, if your expense exceeds the capped amount, Attribuly will automatically put the excess expense into the usage charging of the next month.