Any contact and address of China South Airlines in Bangladesh?

Dear Sir/Madam
I am Syed Rashedul Hossen,a senior Assistant Secretary of the Govt. of Bangladesh.
Recently I've got a Joint Japan/world Bank scholarship for 2 years to study at hiroshima university of japan.
I've got my air ticket of china southern Airlines through world bank's travel agent(AMEX).
Now I want to communicate with the China South Airlines or its agents in Bangladesh but I haven't found any communicable address of that airlines or its agents.
I have found a contact number of a agent(by searching internet) introducing it as a China Southern Airline's Agent but when i made a phone call in that contact number, it told me that its not that Airlines agent's number.
1. So would anybody pl. help me by providing any address or contact number of China Southern Airline's or its agents local office in Bangladesh.
2.Though China Southern Airlines operates its flights from Zia International Airport(Dhaka)but it's yet to enlisted the airport name in the " check flight status" column in its website's page. So I would like to request them to include the name.

Thanks in advance in anticipation of having a positive response.