The company did absolutely nothing other than sending a canned response emphasizing that its policy is not to respond to every individually to every complaint. The problem persists but Duolingo apparently couldnt care less. When I Googled the problem I found that others have had the problem but there is no plain solution to it. If I remove the app then I lose a year s class progress. User's recommendation: Duolingo can just pull the rug out from under you this way albeit probably unintentionally.