What travel agency will off me a visa to China?

I had a surprise the last time I applied for it. I arrived the week that the Chinese embassy no longer was issuing it for foreigners. I asked where I could go and they sent me to a building very close to the embassy. I normally apply for a multiple entry one at the Chinese embassy as it is the same price as a single entry. When I applied for this, I was told I had to pay twice the price of a single entry. I was adamant at first because I had never paid double. For example 15,000 yen for single and now they were asking me to pay 30,000 yen for a multiple entry. I turned that down and got a single. When I asked them why, they said something to the effect, "We are responsible for you." I will travel again for the Spring Festival and hope I will not have to pay double for a multiple entry. Can anyone tell what travel agency I can get one at and if the price for a single entry and multiple entry are the same. I am an American. Thanks!