Do I have the flights that I paid for or don’t I….?

I always admired Richard Branson and he’s achievements and decided to book flights through Smart Fares with Virgin Atlantic. Big mistake. Firstly, I selected a route, option to change my flight, option to select an aisle seat etc. and paid the specified fare which I found was astronomical. I received a call from Smart Fares telling me that the flights were not available and after trying to make out what this person was saying as he could barely speak English, I accepted an itinerary only to find that all the other items that I had selected and that were included in the price were s****ped and the amounts added to the fare. I was most disappointed and tried to resolve this with them but unfortunately, they were of zero assistance and I just got the run round. Now I’m receiving “changes in itinerary” emails almost weekly. I’m starting to wonder if I will ever be able to return from my trip as one day I’m flying to Atlanta, the next to Salt Lake City; then I have a short layover and it changes to a long one. Then I’m flying from Atlanta direct to Johannesburg and a week later, I return via London. This is unacceptable and one cannot plan one’s trip or getting to airports etc. if things change all the time. Could someone kindly look into this and give me a call so that I can understand what’s going on and how this works? I find it unprofessional and highly disappointing considering the name and brand. What is going on? These are my booking numbers: Flight reservation code: 104168 Virgin Airline confirmation no.: *DH6Z9L # Delta Air Lines: *H2EUI13 Ticket number: 9327231977406-407. I would appreciate clarification and an explanation regarding my concerns and confusion. Many thanks Maria Grazia Valenti