Hello people. Before i will start sorry for my english, im not so good.Also im not good in SEO. Last days i saw some big changes in my statistic. I checked my backlinks in ahrefs: i should have around 200, and it was more then 4000. I was very happy in the beginning, but i saw most content of the website wich have backlinks was 4-5 url wich, EVEN if they start with my homepage of website, it continuing with something wich is not belong from my website.This is the page wich is not mine: foliexpertenDOTno/new2015frames4.php/ ( my homepage is foliexpertenDOTno ). Strange is: the "spammy" page is not linking to other website, if i click on links i get some server error. Also i can see this pages on the server, souposse i can delete them. What i do before this story start, i was paying for backlinksindexerDOTcom to index my backlinks, and also i pay somebody on FIVER to build some good backlinks(was 28 backlinks). Can somebody tell me if that pages are good for my website(i think maybe its a way to have backlinks) or it a spam and i should get rid of them.Also how? If its a spam it will affect my ranking in google? Thanks in advance.