Very disappointed and disgusting

I had always booked my flights tickets with travelstart without any challenge until last night. I have booked flights tickets for 4 people last night (30/08/2023) around 23H00, the total cost of the tickets were about R9300.... And payment debit went through and the booking confirmation were sent. This morning I have received email from travelstart telling me that the payment for 3 people were successful but the 4th person has outstanding balance of R1022,78 with a payment link. When I try to access the link, it denied me that it's expired. I went to my bank to check what could be the problem but it was confirmed that all the funds went off from my account to them. I phoned travelstart for the 7th times now without help. The 1st consultant this morning told me that she can see there's outstanding amount of R1022,78 that needs to be paid, so she also assured me to send a new link through so I can clear the balance, but nothing has been sent. I called again and the 2nd consultant promised to send another new payment link but still nothing. Another gentleman confirmed that there's an error as it was showing the new prices today that differs from last night, and he promised to sort it out then send the new rectified link in 20mins so I can settle the balance of around R1500... Or so which didn't agrees with the balance confirmed in their mail but still no response. I called again and the lady consultant who responded now told me I must pay the new rates of about R15k, regardless of what was confirmed and been debited for last night. Question is if my Acc had issues, why did they debited some of it, then leave this little amount outstanding as they say? I have been praising this agent for years not knowing that I will be crying one day and to be honest This is the 1st trauma ever since I used their service. I am really disappointed with how I have been treated regarding this. They showing no interest that they need my business further so ALL I NEED IS FOR TRAVELSTART TO SOLVE THIS OR REFUND MY FUNDS IMMEDIATELY.. This morning when