Bad service

I missed my bus departure yesterday due to reasons that were beyond my control. I got to the bus bus stop 20 minutes late and my bus already left from Cape Town to Joburg. An Intercity Express employee told that if I missed my bus they can't help me and I must book for another bus because there's no refund. I wasn't requesting for a refund, all I wanted was to be put on another bus to Joburg because the company had other buses the same day going to the same destination. I have missed a bus before and was put in another bus even if it was the following day, I used the same ticket. This I was told to rebook a new ticket and that my R620 is forfeited. This is a day light *******, how can I forfeit my money like that. I bought the ticket but did not take the trip so the least they can do is reschedule and put me in another bus