Take it easy, I think you just upgrade ROM in a wrong way, you device still works.
Can you kindly tell me which model do you have?
- VIM: 8GB EMMC + AP6212 WIFI
- VIM Pro: 16GB EMMC + AP6255 WIFI
Keep mind that if your device is VIM model, the DualOS ROM which is only for Pro model will not work on your device.
Well, you can follow the instructions below to let your device work again:
1) Follow the Upgrade Via a USB-C Cable instructions
2) Instead the red-circled-steps below, follow the MRegister Mode method to one to let your device boot into upgrade mode:
If any problem, just let us know.