what to do when Bing api provides inaccurate results

Question

I am trying to use the bing Phonebook search for locations in China, but all the latitude and longitude are inaccurate. Using the following

http://api.bing.net/xml.aspx?AppId=appid&Query=nike&Sources=Phonebook&Latitude=39.9883699&Longitude=116.3309665&Radius=30.0&Phonebook.Count=10&Phonebook.Offset=30

I get multiple locations with the same latitude and longitude, and the rounding is off as well. The latitude and longitude will always end with either .x00001 or .0.

The results from the

pho:LocalSerpUrl http://www.bing.com/shenghuo/default.aspx?what=nike&where=&s_cid=ansPhBkYp01&ac=false&FORM=SOAPGN /pho:LocalSerpUrl

Is right, but the results from the returned xml is off. Also it seems users outside of China can't hit that url and get the result. So I am wondering how I can contact bing and inquire about this problem