Hello! I was using an SEO company for a few backlinks about 12 months ago. After 6 months I realized that the links and the service were not very good, so I canceled working with them. A month later they hit me with an invoice (aprox £900) saying that they had continued with my work (although I canceled). After many heated emails i sent them the money just to get them off my case as they started emailing my clients, plus I was worried about any nasty SEO tactics they may do to my sites - which they threatened. This was in August. Today I get an email telling me they never received the payment - although they said they had back in August! I know what is coming next. Threats to send spam to my site. Threats to remove the backlinks they built for 6 months (and to be fair to them - got me fairly good results). My question is, what do I do? I know the main guy is probably reading this right now as he sells he services on here. Is there anyway i can tell Google to forget any spam that hits my site over the next few weeks? Is there any central web agency that can stop these guys? This is terrible that people are so pathetic they turn to untrustworthy behavior... THANKS!