Poor service with no solid grounds of no assistance

I have recently called ITC BA regarding my outstanding debt from my medical aid - Discovery. This was a surprise credit that I didn’t foresee.

I am currently seeking better employment to assist in paying off the large amount of debt. My prospective employer has asked that I provide proof that arrangement to pay off this debt is in order. Upon discussions with one of your advisors, I was made aware that you do not supply such documentation and that my prospective employer should request this. Request information for my personal portfolio? How, because it is my portfolio

A simple discussion that I made an agreement with you, you refuse to supply such information in writing to me.

This is urgent as they need me to start as soon as possible. Please advise as I feel this is poor because an agreement of a telephonic dialogue should be supp**** to me regardless of what I need it for.