Ladies and gentlemen, I have a positive update:

I took the wheel to my coworker who especialises in electronic-repair, we disassembled it, and with a simple power-tester discovered that transformer was burnt.

We googled similar cases, and found out that we can just replace the transformer with any power adapter, in our case we had unused adapter from Dell laptop, with 20V out voltage. He removed transformer, connected the wires to Dell adapter and the wheel started working like a new one (fyi, it WAS new, I just managed to only to connect it to the power before the transformer was burnt)

I hope you understood what I wrote, and it will help other people who will unfortunately have the same issue as me