Wont't allow me to hold

I am an existing client and called in to get a quotation on an additional vehicle, the call routed me through to to their message center and I spoke to an operator (Given), who informed me that they were experiencing high call volumes. I said to him I dont mind holding but that wasnt an option as he said he is not allowed to put a client on hold for more than 30mins and he cant get a hold of someone that can assist at the moment and would request a callback, I am currently still waiting for a call back from a previous call so I informed him that I dont mind waiting and since he cant keep me on hold can he put me through to the queue and I will hold until my turn comes. He said he cant do that which I find kind of strange. He informed me that the turnaround time for a callback is 72hrs and all I needed was a quote. If indeed the option to hold in a queue is not there I find that very sad as people will make alternate arrangements while waiting for a call back as I have now found someone else to insure the additional vehicle and if their service is better will more my current one over as well.