Unfortunately, after the VIP Membership expires, you will no longer have access to the premium content, as the VIP Membership only grants you access to all the VIP-exclusive content during the period you have selected.
Expiration date:
You can always check the expiration date of your subscription by clicking on the Settings Menu [≡] located at the top right corner of the screen.
Otherwise, you can click on Account settings and you will find the information on the top right corner of the screen.