7-eleven Don't expect help from 7-eleven if you are fat Everett, Washington

I was recently at my local 7-eleven off of 4th ave in S. Everett when a girl in a blue blazer in front of me parked in between the pumps.  I rolled down my window and asked if she would please move up a little.  She said something to the effect if I would not move my double chins around so much then I would have room.  We got into a verbal sparing match in the parking lot.  While entering into the 7-eleven she said I spit on her and demanded the employees of the 7-eleven call the police.  I was shocked but decided I better wait for the police.  I asked Moe (clerk #1) if he would ring me up that I would be happy to leave my license with him and that I was not leaving and I also wanted to put $20.00 in gas on #1 he ignored me.  When the girl who had accused me of spitting on her went to the counter and purchased her drink and also had gas put on her pump Moe had no problem ringing up a skinny pretty blond.  I asked him why he would ring her up and not me and he ignored me.  The girl came back inside and was telling both employees that I spit on her, and why do fat girls always think they can fight and she made another comment of me being fat to another clerk, Karen, I said to her, "Shut up B**ch".  Karen yelled at me and told me to watch my mouth, I looked at Karen and said what about her?  I was ignored again.  When the cops did show up the employees admitted they had not seen me spit on the girl.   After the cops left I then went back into the store and asked for the store manager.  When I was told he was not here I asked for the clerks name and the number to the store manager.  He would not give me that information.  I asked why not? He asked me why I needed such information.  I said I did not like his treatment of me.  The other clerk Karen walked over and then gave me a receipt and said I could call that number.  I asked for their names.  She gave them to me.  When I asked for the store managers name she said I was being disruptive and if I did not leave immidiatly she would call the police.  When I called that number on the receipt Karen answered the phone and I asked for the manager.  She said he was on vacation, I asked for the district manager and she said she knew who I was, said that I had spit on that poor girl and said I would have to go through the proper chanels and hung up on me.  I called awhile later and Moe answered the phone saying he was the store manager.  When I said no you are not he said that if I came to the store again they would call the cops saying I was harrasing them. Where do I go from here?  What would you guys do?  I have been going to that 7-eleven for three years and nothing like this has ever happened to me.  I honestly feel that if I was skinny that I would not have been treated like such trash.