Bad service and no one is helping and *****ing our money

My husband and I had booked through a company called BudgetAir with British Airways on 24 of July 2022 from South Africa to Funchal Airport in Madeira Portugal to Fly on Sunday 6th of November 2022 at 22:15. The return flight is on the 28th of November 2022 We have saved for 2 Years to visit my husband's parents ,because they are both old and we don,t know how long they have left to live. British Airways refused me on the flight because of a "Transit Visa" , but we were never informed and were told it was a new system and I did my research yesterday and saw I did not need a "Transit Visa" for a 2 hour waiting period. I saw a lot of complaints about the same problem. My husband is from Portugal so he did not have a problem going through. I don"t want a refund ,I just want a new flight this week so that I can join my husband in Madeira for a visit with family and little traveling. No one is helping me, I have called every resource I have My South African Number is +***3 if you can help in any way please? hope I hear from you soon. Kind regards Yvette Sousa