Mingle Plus or Premium Account has a lot of benefits like:

• You can see who likes you
• Browse other member's profiles invisibly without them knowing
• Find out if someone read your message
• Store all your messages forever. We don't delete your messages after a month
• Get 300% more profile views with your profile listed earlier in search, who's online, and potential daters' homepage
• Hide Advertisements. Enjoy a completely free experience
• Unlimited Message and Nudge

If you are a premium member, please be sure to cancel the paid subscription before closing down the Mingle2 account. Otherwise, you may be auto-charged on the auto-renewal date.

• Go to Settings then select Premium Membership Status
  (Or go to: https://mingle2.com/user/premium_membership_status)
• Click Cancel Your Premium Membership

Billing issues are handled by the Support team. So any queries having to do with the Premium account should be directed here: https://mingle2.com/welcome/contact_us