Most pathetic service from Kulula customer care - day light *******

I have received the most appalling service from Kulula. I initially booked flights for August 2021, but due to the airline being grounded my flights were postponed. I rebooked for the 19 March 2022 returning on the 26 March 2022 . My initial flight time was departing at 07:50 arriving at 08:55 and departing Johannesburg on the 26 March 2022 at 13:35 and arriving in Durban at 14:40. I received a sms to state my initial departing flight was changed from 7:50 to 08:45, then I received another sms to state my arrival flight was changed from 13:35 to 12:35. I most recently received another flight change from 8:45 to 8:50. Due to the numerous flight changes I was forced to cancel my shuttle service as they could no longer accommodate me. I had to cancel my appointments and accommodation. The only booking I could get for accommodation thereafter was the 28th March to the 2nd of April. I called Kulula numerous times , I have emailed, posted messages on their facebook page and to date no one has called me back. I have asked that my flights be changed and the flights I have selected are at the same cost or cheaper than my intial flights, however I am told I would need to pay a huge amount for the flight changes even though schedule changes from Kulula have caused this problem. Furthermore when I initially booked the class of flights I booked, allowed for 20kg checked in luggage and 7kg hand luggage. In August the class changed the rules and now only allow for 7kg hand luggage and an additional cost is paid for checked in luggage. My understanding of the consumer credit act is that due to the numerous changes by the airline, I am entitled to a booking equivalent to my initial booking. After 20 calls and speaking to the following agents Betty, Lebonga and Babalwa who all insisted they would call me back and never have nor have there superiors. I opted to take a full refund only to be told someone will contact me in 15days and thereafter the refund will take 6 -8 weeks. How pathetic is this service. I am now travelling between the 28th March to 2nd April and have to look at new flights as Kulula service was useless and it has cost me time and money.