Dissatisfied with the service !!

I contacted the first group head office to make reservations at one of their resorts , all was well I was assisted by Ms Denise Acharya at first, she was very helpful and would always call to clear up any misunderstandings or if I am uncertain about something, it happened that she found herself another job and she left me in the hands of her colleague Nonjabulo Khumalo, all was well at first, I drew up a spreadsheet and every time I asked her to add a room for us I would update my spreadsheet, on the day we paid the balance of group booking bill I then emailed Nonjabulo the spreadsheet and asked her to allocate room numbers and then introduce us to the manager that will be on duty (at the resort) over that weekend, firstly she did not respond to my email I had to call her 2days later to ask if she received my email of which she responded yes she would start sending guest certificates, some of these guest certificates were incorrect and when I returned them to her, her response was that was Denise's fault and its now complicated but she would sort it out, to this day it has not been corrcted ,on Saturday when I spoke to her she told me she was busy with Mrs Naidoo who is planning a wedding but her manager was busy sorting it out , I have not even received a call or at least an email from her manager to let me know that they are busy sorting out our booking. I suppose once you have paid them they move on to the next person who is bringing them money, my guests will be starting to arrive at the resort on Wednesday and I can't assure them that all will be in order, all this inconvenience comes after paying over R30k at this establishment and the least I was hoping for is a seamless experience. My advice to anyone who wishes to stay in any of their resorts, just deal directly with the resort of choice to avoid the same inconvenience.