Sanlam : Unfair labour practices against pension fund beneficiaries

I was employed by the university 1 February 2014. On 1 January was enrolled into a Department of Higher education program called the New generation of academics’ program (Ngap). I was part of the phase 1 cohort of the program, and the contract was for 6 years. The program had a clause that if you resign in the 6 years, you must reimburse the program for costs spent. My contract started 1 January 2016 and was ending 31 December 2021. 2 January 2022, after the 6 years of my Ngap contract had ended 31 December 2021, i resigned as I got another job. Upon my resignation, the Ngap manager and Dhet Shiba indicated that i am supposed to serve an additional 2 years as per the new policy amended in 2018. I however indicated that the new policy was never communicated to me nor did i sign an amendment contract to consent for the additional two years, therefore it cannot be biding to me. The university however sent me acknowledgement of debt letter 23/02/2022. I did not sign the letter as i requested written agreement that stipulates i agreed to work another two years. They stopped communication with me thereafter. My paperwork for withdraw of pension fund to sanlam was submitted and received a notification (17 March 2022) that it will be paid in four weeks. After four weeks when i did not receive payment i followed up with Administrators Duan Voster who informed me that the university decided to put my payout on hold. When i called the university, they informed me that i must sign the Acknowledgement of debt first. My employers are using an unfair labour practice against me and have decided to hold my pension payout to persuade me to sign acknowledgement of debt. Sanlam did not communicate nor request information of on what grounds my employer decided to put a hold on my pension fund and if they have authority to do so. I resigned from my work for job opportunity, i was not in disciplinary action nor was i accused of any misconduct or *****. However, Sanlam have decided to hold my pension fund even though there are no legal grounds to withhold it from me. Employers are using pension funds against their employees and pension fund service providers do not protect the rights of beneficiaries by doing their due diligence to find out if employers have a probable cause to put a hold or a court order. Sanlam did not even contact me to let me know of the hold on my Pension fund, I had to investigate as I saw months go by without payment. When I called Sanlam, they let told me I need to contact my HR as they also do know. So my question is, Sanlam took instruction to withhold my pension fund without so much as requesting reasons to do so ??