University of Johannesburg not paying Post Graduate Supervisors.

Non payment, In 02/2026 I was asked to resume duties as a postgraduate supervisor, after retiring in 11/2023. After a full cycle of supervision, UJ HR dep refuses to pay me due to my post-retirement status. Something they were aware of when they approached me. Uj is taking advantage of the expertise and experience of retirees to do their work for free. Somebody needs to put a stop to this.