Wrong ticket and they say its not their fault

I booked a ticket online and last night and the details on the ticket was wrong. Tried numerous time to call and get assistance but no phone was going through. I called in the morning after my boarding time as I couldn't risk paying the shuttle money to the boarding station for nothing. When I finally went through and was given an email address. The email was not responded to for hours until I called and was told that they cant do anything about the ticket. I spoke to the lady by the Name Ntsako and she was giving unnecessary attitude. Worst bus service ever!