Was able to fix the phone with the help of *spam*paid*service*. Was very helpful and instructed me step by step how to fix the phone. I had to open the phone and boot it into EDL mode with qualcomm drivers installed. He took over via TeamViewer and flashed with authorised account.
CC9 Pro (bought in China) stuck in MI Recovery 3.0 and reboot loops back to the recovery screen. Device is locked with the global rom. There is red text on the recovery screen which reads "This MIUI version can't be installed on this device." Does not matter which Mi account I use...