@Amburgey1960 Check out my messageherefor instructions on how you can cancel your subscription.
Once you start hearing ads again after following those steps to cancel, you can delete your account completely.
To delete your account from the web:
Open your Settings.
Click Account in the left-hand column, and then Delete Pandora Account. You may have to enter your password to confirm.
To delete your account from a mobile device:
Open the Profile tab and then Settings by tapping the gear icon in the top right corner.
Select Account, and then Delete Account. You may have to enter your password to confirm.
Please keep in mind that deleting your account is permanent. Once complete, there will be no way to retrieve your stations or any preferences (Likes, Thumbs, Bookmarks, etc) currently saved on your profile.