Account department doesn't exist

I registered my daughter and used my bank info to pay for the application online. And in the application process they ask you if you prefer paying the entire lumpsum or pay monthly. Now because I have a bursary scheme I am part of, I chose lumpsum. My application was processed and approved within a week. In the approval email they mentioned that the payment will come out of the card I used to pay for the application. Now I didn't authorize this, I wouldn't because I had no intention of paying the amount from my own bank account. And behold the money was indeed deducted from my account. This means I was at a negative of tens of thousands of Rands. No explanation, no invoice, nothing at all that gives me any chance to dispute this. Since then I have been requesting a statement of account or invoice or any sort of acknowledgement of the payment at all. I have logged numerous tickets on their system. All their numbers have been disconnected and so there is absolutely no way of calling them. I am at my wits ends and my credit score has been affected as I was not able to do anything for a long time due to a negative balance in my account. My bond was never paid, other personal loans were missed. Even today 2 months later there is still no resolution to my problem and no one cares.