Hello! First turn off and on your phone. Then, check for updates for the phone itself and the application. Try to make adjustments to your motion smoothness in the display setting. Also, for the claims, if you did it properly, it is sure to arrive. I received mine about 2 weeks ago if I'm not mistaken.
Perhaps it would be advisable to reach out to the store for further assistance. Since all options have explored, I assumed. That's on the day it's to arrive you were at home or not. Neighbours or it could be with your local post office.
I was wondering if you have the same issue still..my device been bought last month and fps dropping by 1 after I cut the video. Never happened before...