Harrassment

This company has been harassing me for months now on sms, regarding a payment that they say I owe to SMU.I called and spoke to Takalani who referred me to another person in the company.I explained to the lady that I went to that university in 1998,for that year only and they were paid,I don’t owe them anything.I told her that the student number they have is incorrect and she asked if I was registered at that school in 2019 which I rep**** no.I asked her to furnish me with details of where they got my information and the statements regarding their claims and they have not reached back to me since my request.Now,they have started harassing me on email about handing me over.Ignoring my request to provide me with proof of their allegations does not qualify as justification of their harassment of me.Either this company is lying or SMU is lying.I left that university 24 years ago,there’s nowhere in hell I owe them.