Unisa ****mers

On the 17 January 2024 i registered with Unisa. The text message for Temporarily registered minimum fees due received was R4,790.00. I made payment of R4,550.00. On the 16 February 2024 when i went in to pay the R240.00 so that my modules can be made active, they now changed my fees, nobody knows the reason for the increase and they sent me a new message saying i should pay R1,790.00 which they can't explain is for what!! I will only pay the R240.00 if not i'd rather get my R4,550.00 refund.