Scammed/Got Infected Virus via a seller on ENVATO - trying their "Live Preview" programs for Sale

Once clicking on their “Live Preview” I received - on FireFox" a screen came up citing and ERROR Code 0x80016CFA and to call an 800 number where there perport to be licensed MAC/Microsoft help agents - but are HotShops in INDIA that try to take over your computer and then request $150 to $200 to help you resolve problem. What up ENVATO? Why did you not VET these companies from INDIA? Makes me second guess your services - not vetting sellers and their posted links for Live Preview. I am very upset at this action… which is costing me hours, upon hours of my company time - time that generates $300 per hour.
What can you do.