I really don't think this is the issue here. It is quite clearly pick up only in 2 prominant places. This is a newbie who hasn't noticed those so unlikely to look further to a less prominant place for COD. They have also not responded to my numerous messages, which suggests they are not familiar with the messaging system. 

Yes I inadvertantly clicked COD but honestly if it says pick up only most people know what that means. I have also offered to post but have had no response to that.

There is no cash on pick up that I can see .