They are sufficiently successful that they continue their attempts to scam people.
If they were not successful, their costs (however small) would be greater than their income.
Read a fair number of posts in 800notes, and you will see that some posters state, "I have been scammed" ... in other words, they fell for the scam ... in some cases, more than once.
We try to educate folks ... but, they usually come here AFTER getting scammed. It is the fortunate group that checks here before sending money.
Left a garbled voicemail in an indian accent, couldn't really understand it but ended the message with "legal action will be taken if not replied back". Definitely scammer.
This is a rather threatening message. I checked here before talking to them. However I did call back and now I am sorry I did. I am going to write a letter.
You shouldn't have done that. And, writing a letter to a bunch of Indian scammers will accomplish absolutely nothing.
Ignore them and don't talk to them. Read all of the previous posts....