We've added a "Activity Recovery" item which you can purchase on the itemshop at https://fgunz.net/recoverap.
For 100 coins, this will allow you to set your activity points back to what they were before they were reset to 0. You can only use it when you currently have 0 activity points and previously had more than 0 activity points achieved.
One good example to use it is when you go on a vacation for a few days. Once you come back you can purchase the recovery and your activity points will be set back to what it was before you left.
