Buying a membership

So im trying to subscribe for an online plan , im trying to buy the £4.39 plan … so I click on the button and it comes up with “Error while retrieving infomation from server . [DF-AA-20]” and it keeps coming up I have restarted my device and the game still the same any suggestions ?

Thank you for contacting support! Customers using an older version of Infinite Flight that are unable to update in their App Store based on device compatibility will no longer be able to renew a Live or Live+ multiplayer subscription. If you have previously purchased a Live or Live+ subscription your service will still be honored and supported for the duration of your subscription period. Following your subscription expiration date or when trying to purchase a new subscription you will find “subscription unavailable” or message similar to what you received.

Infinite Flight’s newest update featuring global satellite imagery introduces the Infinite Flight Pro subscription which gives a full global flight experience and access to our entire fleet of aircraft. We appreciate your understanding as we move forward into the future.

Kind Regards,