Hi MVM, Agoda Extranet is actually called YCS and you should have a username and password to log into that. In there you will find the contact details of your local representative but don't expect anything to get done. Agoda are the most useless 'OTA' that we've ever deal with and are generally unprofessional. I have found that they were charging all the extra commission for a programme not disimiliar to Genius Booker at Booking.com (can't remember the name of their promotion now). Anyway, to cut a long story short I asked them to take us off that promotion (took 4 weeks to accomplish!) and we are no longer charged the ridiculous commission rates.
Hope that helps!