And yet another thread filled with nothing but assumptions. Nobody has been arrested so they are perfectly capable of contacting Hhampuz.
You don't know they have not been arrested. This has not been announced one way or another.
Further, the time frame that Hhampuz spent the money is not constant with what one would expect. Assuming the BestMixer operators have not been arrested, recovering ~$4,300 in advertising expenses is probably low on their list of priorities immidiately after the government shut down their business.