Hitachi Energy were out at the Piana Mwanga power station quoting on refurb last October (2022)
Their employee posted on twitter about going there for the work / quote.
If turbines are were removed illegally , very good chance they are doing the work
AVZ management could send them a polite letter , that their client that engaged them has no right to do so, and return the turbine
Its unlikely to have left DRC yet , AVZ also got quotes from GEC but work had to be done in Germany for re-wire.
Would imagine the same for Hitachi as the expertise is not in country