Not paying pending dues past 3 months - Vice President bei Bertelsmann: Mitarbeiterbewertung

I have been a part of Senior Management at WizIQ funded by Bertelsmann. I have the build the Sales Organization from scratch and due to down sizing parted ways. Company CEO Mr. Harman Singh and Kaizen Private Equity MD - Sandeep Aneja, Reassured that the not paid installments will be paid in Oct '18. No proper response from WiziQ or Kaizen PE or Bertelsmann to pay my dues. This is one of the last things that you want after leaving even after serving for 7 years. No one like to respond even when written to the company CEO Thomas Rabe. Really pathetic way to deal with