ABC DESIGN STUDIO abcdesignstudio.co.uk misleading advertisement Internet

I purchased websites from ABC Design Studio and turned out to be very very bad investment.  I was mislead to believe that they are going to be easy and do not need technical knowledge.  I also purchased extra SEO Advanced Plus for $500 (I forgot excat price)  that did not do a thing.  The sites did not make any cent.    Now that I wanted to sell them, they do not want to help me describe the sites for posting.  I also could not answer technical questions from potential buyers.  I asked that thy re-post the sites in their websites and I will pay all the fees but they do no want to do it . Why?  My guess is that they have duplicates of all the sites anyways so they just change the names and find another victim.  Why would they repost my sites when they already have duplicate site posted as soon as the website is sold.