Don't fly British Airways Comair - Customer Services is Non Existant

On 25 March 2021, I made a British Airways reservation for my wife and I in Business Class (Club) on flight BA6324 departing from Durban for 1 April 2021 at 7.45am and arriving in Cape Town at 10.55am and flight BA6323 departing Capetown on 5 April 2021 at 11.35am and arriving in Durban at 14.35. I paid in full for these flights. On 30 March 2021, I got an email notification that the return flight BA6323 departing Cape Town on 5 April 2021 at 11.35am has been cancelled and that we were now on Flight BA6303 departing Cape Town at 9.20am. I tried to reschedule this flight online to a later flight but BA's system wouldn't allow me. I phone the contact number on the email and held on for just over an hour with no one answering the phone. Eventually, I found another number and got through to the executive club only to be told that they can only give me a flight the next day (6 April 2021), which I reluctantly accepted as it is costing me anither day's accommodation and car rental. They emailed me the new confirmation. On 31 March 2021, I wanted to check us in for my flight BA6324 departing at 7.45am only to find out that they have cancelled this flight too without letting me know. We were now rebooked on Flight BA6300 departing at 7.00am. I tried to check in online and the BA System wouldn't allow me. Again, I called the number given by BA in the email and on their website *** and selected option 1 for domestic reservations. Once again after 30 minutes of holding on no one answered. I then tried the Executive Club Number and twice the lady answered and insisted on putting me through to the same local "customer services" number that doesn't get answered. My advice is to rather fly with other arilines as there is no customer service at British Airways. They have become a faceless oragnisation that will take your money, mess you around and you have no recourse!