I just received my aircraft back from repairs, now I can NOT connect my controller ro the aircraft. Please help. Thanks

hey can I know what phone you are using

Do you mean you can't connect a bluetooth controller, or you can't connect your phone? Give us a little more info and we can try and help you troubleshoot a little better.

Sorry to hear about your unpleasant experience.Hope the following steps linking controller and Tello would help.
1. Start the Controller.
2.  Enable Bluetooth on Mobile phone.
3.  Launch into Tello APP
4.  Go to Setting - Bluetooth Setting -  Connect Controller's Bluetooth.

If no good luck, may I know if you can connect your mobile to Tello？ If yes and you are still experiencing this kind of issue，please do feel free to contact GameSir regarding with this since they are the one who offers tech support of T1D controller, just email them to this email address cs@gamesir.hk. Have a good day!

Start the drone connect from phone to drones WiFi open app connect co troller and it should work Perfect. Hope this helps.