Beat up,cops wouldnt help?

Last night I was sitting at home, my neighbor came over and said he was having a get together at his place directly across the street. So I went over, his family was there about 7 latino males and 5 latino women, we are all having a good time. We were all drinking, and we were all outside in between two cars when suddenly one of the women ran over to me saying "you can't hit him like that!" and started hitting me (I never hit anyone to begin with of course) and at that moment all of them began to hit me, my 12 year old son saw the whole thing happen and began to try to helo me and get my family. I managed to make it across the street almost to my door when one of the men grabbed a sledge hammer out from the back of his truck and hit my leg with the hammer. My family was trying to get me into the house when one of the women attacked my 18 year old daughter. Once we made it into the house we called the police. They came and talked to us for about 3 minutes, then went over and began 'invesitgating" at the neighbors for approx. 15 mins. When they finally came to out door we invited them in and they basically said that the neighbors said I was calling them racist names and thats why the fights broke out. Also they said that I was the one with the sledge hammer! The police said the neighbors don't want to press charges and if we wanted to press charges then they would have to bring both families to jail! This isnt right something should have been done, we didnt get a police report and I dont understand why the police were talking to them first and why they believe them. What can I do?