ticket rescheduling

I bought a ticket from East London to Johannesburg then I had a problem and changed the ticket to be the I'm using for my return because I had to leave early, on the 31st when I realised that I could not go back to EL the following day I went to the Translux offices in Nelspruit to ask for advise on what can I do and explained the situation, the guy who was at the office gave me the worst attitude ever and was totally rude told me that there's nothing I could do because I had already changed my ticket once. When I called the call centre later that day they advised me to go back to the office and freeze the ticket, which will be valid for three months and I could then use the ticket to travel anytime on that three months, when I went there I was helped by the same guy and he told me he doesn't know what I'm talking about and that I must go to Johannesburg and ask them to do what I am saying, I ended booking another ticket for the following day, he then told me that he has frozen the ticket, when I asked him when can I use it he told he doesn't know I must ask the Johannesburg people.