Bus seats mix up

This is is to lodge a complaint about the service received form grayhound. I purchased tickets at pick n pay on the 22nd December knowing that they are a partner to grayhound. Then getting the receipt I get home and get an sms confirmation my booking with tickets seat that are different and my 3 year old daughter is separated from me, first and foremost how do we book tickets all at once and get different seats. I call the call center (ref no: ***:00) spoke to a Sibusiso who blatantly told me that the system that pick n pay uses is not the same as grayhound, how do I know as a customer because I went to pick n pay knowing that they work with grayhound, the agent tells me I was supposed to know and with pick n pay you hardly get the same seat. In all this my worry is how can my 3year old in this pandemic seat next to stranger we do not even know where and who they have been with. If this is how grayhound policy and company treats customers then they should just state so. I paid &R4450for the tickets and I am told if I want to change seats they must charge me again. I am highly disappointed by the service and worse part is we have not even boarded the bus yet. I do not want to be associated with a company that has policies that undermine their customers.