Meesho — I have received Scratch and win lucky draw coupon

Address:

Meesho Online Shopping Pvt. Ltd. City Tower Complex, Sasthitala Lane, Atghara, New Town, Kolkata, West Bengal - 700052

I have received a letter from Meesho mentioning that we have won 750000 cash prize in a scratch and win lucky draw. The letter is received from Kolkata-:Meesho Online Shopping Pvt. Ltd. City Tower Complex, Sasthitala Lane, Atghara, New Town, Kolkata, West Bengal - 700052
The registered speed post letter saying that i've to contact the given number to redeem the bagged price and to pay the 4%tax in advance after making a call to the help line number of mr. Kamal Singh. I have already sent 7500 and 22500 this number [protected]
Help to get it back my amount
This fake or real i don't know.
Please help me