Registration fee payment can be done at 

https://payments.uct.ac.za/debtors/

by credit card. You will find there a short form. 

• Fill in  the "Customer number" field with "12062" . That will automatically fill the next entry ("Company") with "Dean's Office Science Faculty". 

• Fill in the "Payment details/Invoice number" field with "000" 

• Go to the next page ("Proceed" button), where the PayU platform will allow for the credit card details to be filled. 

Please, send proof of payment to  itu@saao.ac.za.