As someone who has dealt a year or so ago with their London office staff..( who were actually in the office )..during a period of 6 months, getting them to act and sound like adults and not teenagers whose teacher has left the room would have helped..
Less professional would be hard to find..
Their Swiss office and their Irish office were extremely professional..
Their London office was just an uncoordinated shambles..they wasted my time and money with them..each of them contradicting the others..
I gave up ..