Medaco not even following up, just demand money!

Following up on a UIF Case for someone that hasn't been working for me for more than 12 years. Never has UIF or Medaco picked up a phone to call and find out what the issue is. the employee left as she didn't want to pay the 1% UIF funds. What was I supposed to do. Now I am indebted to them for over R59346.59 as they never followed up in more than 10 years. Is this how institutions catch out people to pay more than they should? This is not right. I have sent email after email, right after receiving the confirmation of them demanding funds. Is this what life has become? A demand left, right & center to scare people in paying for something? without following up. and still no confirmation can be given as to where they called to follow up with me. This is wrong.