Poor Customer Service

My family of four members missed their bus from Cape Town to Durban, by a mere 5 minute, and at the Cape Town Greyhound office I was told there won't be any refunds nor means to try and get them on the next available service. I've been back and forth with the Customer Service Manager, on emails, and til this point nothing has been done to try and resolve this problem. I have lost more than R2500 worth of tickets that went unused!!!