MSC Cruises are becoming ********

MSC Cruises are becoming ********. I made a BOOKING directly with MSC back in 2019 for 2 Cabins each at over R14k the holiday was for December 2020. Covid happened I was issued with vouchers to the value of what I had paid and changed dates to the new season which I'm booked for 17 December 2021. Upon new dates and redeeming vouchers I was told there's a shortfall of R1000 and R800 respectively for each of my cabins due to higher port charges and date changes as if it's my fault. I called to check if all is in order and made payment on the on the 26 October 2021. Today I got a message that we are 75 days away from sailing and I have a shortfall of R288 on each cabin and if I don't pay by the 15th my booking will be cancelled. How much more money must we pay to avoid all the threats IT'S ENOUGH NOW, had high hopes and was looking forward to this trip but now I have changed my mind due to this experience