I paid them 500 USD with PayPal to back link my website and the PayPal (Unique Transaction ID # 11H22194AU757961C)

I know that google update his page rank in 4 months and every time when I sent them an email with question how much longer to wait for the result, I was told that Google has not yet updated his PG.
Despite my other websites were updated which I back linked my self.

Do not send any payments to the company, they are just scammers. I am sure that I am not the only one they have scammed, so please share your experience as well?