My young cousin got contacted by this person on Instagram and asked to invest 1000 rupees to earn some amount in return 

My cousin first paid 1000.

Then he asked to pay another 3499 as withdrawal charges.

My cousin paid it.

Then he asked to pay 8599 as conversion charges.

Again my cousin paid it.

After this he is asking for 16999 as gst .

now my cousin don't have this much amount so contacted me and asking me for money.

Then I asked the reason and explained him this is all fraud and scam you should have reached me before investing or earlier