jx command to delete the PV's (Persistent Volumes) associated with a helm release

Question

I am trying to delete all the resources of a deployed micro service like Deployments, services, PVC's and PV's associated with a helm release using the "jx step helm delete {release_name} -n {db-backup}".

This deletes all the resources except the PV's. And I am unable to use the traditional kubernetes commands in the Jenkinsfile to delete the PV's.

Please let me know the jx command to delete PV's.