Online payment processing frustrating

Good day I booked a Johannesburg-Durban flight with FlySAFair and received 2 x booking receipts XH8VKQ and ZYINP9. FlySAFair is requesting a payment or the booking will be cancelled. The credit card payment went off on my account, although its reflects "uncleared". My bank advised that the FlySAFair merchant needs to release on their side, as my bank has finalised. I am getting zero response via FlySAFair whatsapp and normal calls ***. My bank is willing to corporate to assist, BUT I cannot get hold of you. I cannot make "another" payment as its already done!!! If I reverse, I will sit with the same problem, as I have no idea what to do differently. Fix this urgently!!! I will not be paying a higher fee if I lose my booking, when you are unavailable to assist, timeously. The auto response help@flysafair is also ineffective. Fix this, please.

Regards Irate and frustrated traveller