I.F pro subscription Monthly wont stop

I bought infite flight at december 2017. I also bought infinite flight pro at that time, so my subscription gotta end on january right…? But on February and March it still continues(i cant remember in january). Is it because the developers Add a Free Pro version ? Or My account is just automatically Bought another pro subscription without me knowing it???
Plss … help ! And srry if my english is not that good

Thank you for contacting support. Auto-Renew can be cancelled directly from your App Store or PlayStore app. Please find the instructions for your store below:

Google PlayStore:
View, change, or cancel Google PlayStore subscription

iOS App Store:
View, change, or cancel your App Store subscription

So we can continue to improve for our customers, could you please let us know why you do not want to renew your subscription? We appreciate your business and feedback!