How do I post information abut a scam on the interernet?

Here is the Question: How do I post information abut a scam on the interernet?
This morning I paid 7 for a product that said it would help me become a Rebate Processor. It is a total scam.
There is no such thing. This program is just to have you promote this scam to others by becoming an affiliate and marketing it by paying for Google adwords, etc.
People need to know about this.

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How can I send in a fraud Abut Interernet?

This morning I paid $ 197 for a product that said it would help me a refund. It is a total fraud.
There is no such thing. This program is only to have to this scam to others by an affiliate and promote marketing through Google AdWords payment, etc.
People need to know.