Ecom Express — Order no [protected] please deliver my order urgently

I ordered from wow website and i was supposed to get my order yesterday the delivery person called me only once. I couldn't answer hence when i saw i missed the call i tried to dial the number again but it was asking for pin and i couldn't connect with the delivery person directly . I went to the website and picked the delivery date again and asked for the delivery on todays date. But now my package is showing in rto locked stage.. What is that supposed to mean? Is my package going to return. I dont want to return i seriously want my package today if possible. Please look into this..