Bad Service and incompetent staff

I made a booking with Quarterdeck in Aug 16, 2022, 10:25 AM paid the booking in full and didn't realize that the time slot is only for one hour. I then contacted the restaurant to ask for a later slot they mentioned they unable as they are fully booked. I then asked for an half an hour extra to the hour because I feel that my guests wont be able to eat dinner and dessert within an hour. I spoke to Vincent the manager. He told me that he would have to speak to his manager and will get back to me. its been 4 days with today that he has not gotten back to me I also asked about getting drinks and would like to arrange for payments for the drinks as it has to be done in advance no feedback on this either. I then decided on Friday to call in to ask to speak to Vincent every time I called I was given the run around that Vincent is in meetings and cannot take my call the 25th I will then go to the restaurant go directly to the restaurant after work just to find that the manager is not there. I then spoke to a gentlemen call Romeo who assured me that they are able to make alternative arrangements to accommodate me and will speak to Vincent and call me back befor the weekend is over, guess what he also never called or sent me an email back. I asked about cancellation if they are not able to accommodate an extra half an hour the guy said no that will not be needed as he will speak to his manager and they will sort something for me. I asked if there is a cancellation fee so I can have my ducks in a row should they not be able to accommodate me. No one has gotten back to me and my booking is for the 17th Dec 2022 I mean in order for me to get another place I need time in which i told the guy to please get back to me soonest so I can know if I have to cancel and find something else. This experience is very frustrating and unprofessional surely for a place so well known I would expect better service than this. I am extremely unhappy and would like a manager to send me an email with feedback regarding this. as I cannot be running after a manager that is incompetent and makes promises that he cannot keep up with. I cannot send emails for a whole week and not get responded to I had to drive with my petrol to speak to a manager very appaling.

My email address is taylorjunaldo@gmail.com its is better to email me as I cannot answer calls from 8:00-4:30 but I can check my emails and reply the whole day.

Please I would like someone to respond with effective feedback on my situation.