As far as I know, the only way to bring your router back to work again, is to downgrade the firmware to version RUTX_R_00.01.06 via CLI using the command sysupgrade. Unfortunately, to my knowledge, it needs a factory reset.
Regarding upgrade to firmware RUTX_R_00.02.01.1, in my humble opinion, we should have the firmware in .img format. I don't know why developers had modified releasing firmware from .img to .bin, but my problems has started in that moment.
If you can contact your local reseller, my suggestion is to try to escalate your incident to the Teltonika Support, because this isn't a real support page.
If you succeed doing that, please let me know if you can obtain a .img firmware.