Zero response to serious service complaint

Adjoining business class sleeper seats were requested and PAID for 2 unaccompanied minors on an overnight trip from Grahamstown to Jhbg on 26 December. The children were put into standard upright economy seats due to an administrative error by Greyhound which initially seated them separately, and were both distressed by the unexpected changes in travel. Their father Brett Udal has sent emails to Greyhound, contacted customer care, posted on their Face Book page, yet a month later has had NO response nor any offer of financial compensation for the cost of the business class seats which were not supp****. He was advised to contact Team Leader @ Greyhound and has done so, as have I [ grandparent to the children] but Greyhound has still not responded. This is inexcusable service and should be brought to the attention of their holding international company and the public in South Africa.