Travelstart does not care about customers

Made an international flight booking with travelstart and had to do a date change a few weeks before the flight. A few days before the new flight date I realised that the new ticket was missing the last letter off my surname. After being messed around for two days by travelstart and finally being told it was now impossible to change because it was less than 72 hours before my flight (contrary to what the airline rules are which allows for changes 2 hours prior to flight) I have still not been contacted by the supposed "supervisor" and will very likely not be allowed to board my plane because of this clerical error.