I have sent money to them for my order but they denied the receipt of the money. I have checked and confirmed with my bank and their bank that the payment has been received by them, but they still deny any payment received.

After investigating and reading from forums and websites about similar scams, only then did I realized I have been scammed. These scammers have similar characteristics. Note that they all are from Shenzhen/Fujian, China. Their sales persons are mostly girls (disguised). They work almost 24/7 to hunt. They will claim that they are different from other companies and genuine. They are also nice in advicing you to be careful of scammers when they actually are the scammers.

Scammers are also competing with other scammers to hunt for victims. So, they will lead you to think that other companies are scammers and they are different. Almomst all of them are certified by Alibaba.
This company claiming to be Genuine and Certified by Alibaba is not genuine at all. They are scammers!
A few of my acquaintances also got scammed by suppliers found in Alibaba.

Alibaba.com is the center of scammers. Scammers and victims are gathered in this website and Alibaba is doing nothing to really certify suppliers but protecting and nurturing scammers because they are Alibaba's source of income. Scammers are certified by paying an amount of money to Alibaba.
Even if the scammers company is closed, it will open again using other name by paying Alibaba money. Alibaba will be more than happy to certifying them again. By repeating this process, Alibaba makes more money.

In conclusion, define Alibaba's stream of revenue.