Work Z and previous problems

So I worked for a company for about a year on a Work Z only to find out later the as my agent had used another company's name on the visa, and the agency had me working in an unlicensed school resulting in me being placed in administrative detention and then given a 10 day type to leave. I've checked with several people (who have some guanxi) and they've checked the records and told me I haven't been banned. I desperately want to go back, as my hometown is boring as hell, and the majority of my friends are in Beijing. Although I haven't been banned I apparently have a record of working illegaly. Does anyone have any experience with going back to China with a record? Or obtaining a new one with a record? Any and all help is appreciated.