Disgusting customer service

I booked seats online for my mom and my 3 year old brother from Masvingo to Johannesburg on the 14 th of August. When I booked the tickets nothing was mentioned about the seating . Now they been seated on separate seats and my brother is screaming . Imagine a child in a bus full of strangers seated on a separate seat with their mom. My mom has tried speaking to the drivers but they are not helping at all and they are very rude. I contacted the call centre and spoke to Phindi....No wonder why she is working in the customer service department..... she is the rudest person I have ever spoken to in this world. She said I was supposed to send them an email informing them there is a minor travelling after booking the tickets . How was I supposed to know? Surprisingly their system asked for the child's age when I was booking, so how did the system not pick up that the ticket is for a minor . She asked me to contact the drivers directly and to find out which bus number the passengers are in as there are many buses travelling on that route. Surely with the ticket number that I gave her , that information could be picked up. Passengers please think twice before you use this bus .... in the event of an accident there is no track .