Paid for the app but no delivery of services

I paid for this app last year, and last week I opened it and it wasnt working. I tried waiting to see if there would be an update, but nothing. All but one of the features is locked.

ashlee.esteban about InsTrack for Instagram - The Most Powerful InstaFollow Tool for Tracking Instgram Followers, Unfollowers, Best Friends, Ghost Users Plus More, v2.3.6