PLG Schools Carlswald Bullying tactic to extort money

PLG Schools, Carlswald, have wrongly handed me over to Credit Intel who are Debt Collectors. There is nothing outstanding to the school as the full amount was paid for the 2019 Academic year. My son was not in the School for 2020 Academic year. PLG School, Carlswald, is NOT a registered school with the Dept of Education and so are many of their teachers. What are they trying to achieve by extorting money ? They are using Bullying tactics to extort money.. No statement was issued and then i suddently received a demand for payment. I was even issued 2 accounts form the Debt Collectors, and one of them didnt even belong to me.