After your WAF instance expired, you can release the WAF instance by terminating WAF.
Note: Before you release a WAF instance, make sure that all protected website domains are resolved to the origin sites instead of the WAF instance. After the instance releases, all website configurations are cleared. If any request still reaches the WAF instance, it cannot be forwarded.
Log on to the WAF console, and select the region.
On the upper-right corner, click Terminate WAF Service.
Confirm that all protected website domains are resolved to the origin sites, and click OK to release the WAF instance.