I get waiting a month to have your own plane back, is a little much. But sometimes you can’t prevent real world issues. Each player is in a different situation. For me, I’m playing the Washington Airport, where I have over a 120 contracts. So, missing a few planes did not hurt or affect me in anyway. Like I said, someone else could need those planes because they just started a new airport. Therefore, just cancel the contract, if that works, I have not tried that. Start with a notification, you just don’t know when they will read it.