visa issues in China

I am an American businessman who have been doing business in China for a Decade... Travelling back and forth between the west and China. Never had an issue. Until now.
My visa is a m-business visa for a year, multiple entries but I must leave China every 30 days. Well, six months ago I overstayed four days because I was in hospital and last month I overstayed by a day because I forgot that October has 31 days.
The authorities told me to pay the fine, re-register in my area of Shenzhen and some other paperwork... All was done. Then they took my passport and on 12/26 returned my passport but my visa.was.cancelled and they gave me a temporary visa and told me to go to Hong Kong and get a nee visa. It suppose take aa few hours so I waited and then I was told that it was denied. I went the U.S. Consulate, called the u.s. Embassy and called two different passport and visa offices in the USA. No one can help. I was told that my name and pass port are flagged so it does not matter where I apply.
What can I do? My personal belongings are in mainland China, I have many pending business in China and I am not getting help at all.
Homeless in HK