Yeah our case was strange because we develop chips and design software related to it. Belastingdienst categorized us wrongly as metalelektro, and we got this guys (Cometec) within two weeks of that. In the meantime we have applied this sector assignment to be corrected, which eventually happened while we were getting threatened into bankruptcy by these guys.
What I don't understand is, we got a lot of help from RVO, Belastingdienst etc before and during incorporation. Nobody talked about this! We got sone numbers from Belastingdienst about social security contributions per sector, but like 15% cut per employee wasn't mentioned once. To this date I don't know what legal basis do they have to ask for this amount of contribution. Nobody mentioned any law, or a decision by ministery of social affairs. Very strange to deal with this, because it's literally someone showing up and asking for money without telling even based on what.. It gave very strong gang vibes, which was surprising for me as I was always a member of a trade union.