ESim Activation Error

Hello,

I have just purchased a Samsung S22 phone and i want to transfer my physical sim in my old Android phone (Xaomi) to ESim in the Samsung S22. I have tried several times   and follow the instructions sent to email every time I copy and paste the activation code, it gives me an error saying 'unable to connect at this time'.  Can some help to resolve the issue please? The challenge now is that my physical sim in the old phone has been deactivated. Please help

Thanks,

Anthony