I had transferred 0.1 BTC from wallet.dat to Poloniex BTC address given in my account, with the hopes of exchanging into other crypto.

However, the transaction is showing as "not found". It is not appearing on blockchain.info

Where is this 0.1 BTC? The wallet is created though and shows 0 BTC balance.

The link to the transaction is https://blockchain.info/tx-index/cec1bb56f2ea5e7936dced00e3e06ad17ee5861ac74c06f36508b2c99a7d1075

It was done on May 22 2017. Have opened a ticket with Poloniex but there is no response as yet.

Please help me out.

Absinthe