Demanding funds which have been settled already.

If you don’t want to receive threats regarding an account you’ve already settled which your medical aid also paid for don’t consider this institution, this people sent me multiple threats via email which said I’ll be ITC listed for an outstanding balance which I settled after they notified me that my medical aid didn’t pay a balance due to them , I advised that I am unemployed once I get the funds to pay I will do so, which I did but guess what they sent me to collections claiming I still owe them an amount of R400.00 , which was already settled, the R400.00 turned to an additional R500.00 (R900.00 in total) , I sent email with POP that the R400.00 was paid but that was not enough according to them I owe them , they will send you to collections for an account which has been settled , so much for helping people deal with depression just to add to that depression , go to them at your own risk