The worst service I have ever gotten

I got a ticket on the 19th of April. The ticket was to fly Johannesburg to NY on the 4th of may, on the 1st May I tried calling to change the date and the phone just puts you on waiting. It was first 43 minutes they said the waiting time would be, I waited and after 43 minutes I just kept waiting until 2 hours, second time I had to wait another 1 hours and after one hour just kept me on waiting for 3 hours. And they phone was never answer despite the time waited, I called the third time and this time they said 0 minutes waiting time and still it just left me on waiting song for another hours. I finally decided to send an email and there was an automated response with a reference number #722531 saying someone was going to contact me between 48 to 72 hours. Since the flight was after these times I thought things would get sorted. On the third of May I saw no response, and decided to call the airline directly, they said they could not make changes, only the travel agency could do it. I finally asked them if they could at least just take me from the flight list and leave the ticket opened and they could do that. That way I would not have to pay a non show fee. Since then I’ve been trying to contact the airline the rebook and not even one response. I called the 4th time and it tells me I would stay 2 hours waiting I just gave up because from experience I have seen that would be a waste of money on the call. I have sent them an email explaining that if I don’t have a response this weekend I will have to go to the bank and reverse the paid amount of R35000. The banks do protect the clients in this aspect. It is a long process but the outcome is always positive specially because of the lack of response of Travelstart. What upsets me is that this is a South Africa company, I don’t use international travel agents because I want to be protected and still this happens right here at home. This goes completely against consumer rights and protection. All they need to do is respond. I sent an email to them before I called the airline directly and told them about the non show fee in case the booking wasn’t cancelled and still another automated response. This is not a way of treating a client. I have bought many tickets through Travelstart before but this is the first time that I try to alter the booking. I don’t think I will ever be buying any more tickets via Travelstart if this issue is not sorted. The date I want to rebook is only August it just keeps crossing my mind if the date was shortly how I would be feeling at the moment. If it was a matter of health, if I had to go out for some medical treatment how I would have sorted this issue? I am sure they are people with such issues and pains me that a company based in South Africa will not even have a proper response handling team. They can sell the tickets, they will take your money but that’s it. They don’t care about you. I have seen complains of tickets that got cancelled for no reason and people got stuck at the airport and they don’t respond.