Buying tickets to Hangzhou at Shanghai Railway Station

Hi, I have a few questions;

1. Where is the ticket counter in SH Railway Station, to purchase tickets to Hangzhou?
Is it counters 7 - 16 at the South Square?
2. The price shown on your website is 92.5RMB/adult. Is there any service fee if I purchase direct on spot？
3. On which floor of the building do I wait for the ride?
Thanks in advance!