BALANCE DISPUTE

I am not happy with the service , i have a balance query with the institution , i have been disputing the balance with them and they have been telling reason that only make sense to them . A bursary is paying for my son's fees , payment was made after February , according to them the bursary paid after the discount which was valid till end of February , which i understand how the discount works but my question to them is payment was made after February and the statement that we received in Feb only reflecting balance due R750, I called their offices , sent numerous emails to *** and ***. still have to not received feedback or any communications from them ,last week Monday went to Newtown campus were i was assisted by a lady called Nadeen who escalated the matter to her manager , mind you they are 2 statement from them showing different amounts, , there is a statement showing that payment was recited March and there is also one that shows that payment was recited April . on that day I made a payment of R750 that was reflecting on the April statement that was showing an amount due to them . I was promised to get feed back last week Friday , even today i have not received feedback . Nadeen is now not taking my calls nor respond back to my massages , the reason why i am being assisted by the bursary is because I can not afford to pay for my son fees , We cant even access the result , and i have to send them to the bursary people. so i want to know where is the balance of R55816. coming from , from 750 to 5k haibo