Sorry if I write here, but I can't get a response from DJI support and I'm afraid it's too long.

[size=13.3333px]We need to activate a DJI Enterprise Shield on a Phantom 4 RTK of a customer. The drone has beed activated on date 02.12 at launch time, then we bought a Shield code and tried to activate it on date 04.12 at about 10 AM, however it said that 48h has already passed. We tried multiple time but with no luck, so we still have a valid code.

[size=13.3333px]I no longer know whom to address, can someone help me?

Hi there, you can send us a verification video to get permission for activating the Enterprise Shield. Please take a look at https://repair.dji.com/en/djicare/customerupload for further info.