Sian Lindemann Susan Shlagg Ripoff theft lies scam monument, Colorado

Sian Lindemann sold two fine art works of mine over a year ago to a client for $2400.00 per painting I agreed on my price at $1200.00 per piece. Sian insisted I send the two pieces as to not upset the client but had only paid for one, after many atempts to collect my money from Sian all I have recieved is lies and no money. I found my stolen art on Fine Art America on her gallery site as well as Jeff Shomay's site. They were asking $8.000.00 per painting claiming the money would go to further my education, the art has been pulled from the site since I contacted both partys. Sian Lindemann who's former name was Susan Shlagg is not to be trusted. Iworked with her and her ex husband on the island of Maui years ago and since failed to remember it was her ex husban who could be trusted and not Sian who simply cannot.