I can't believe I did it, but I did. Pasted my LTC wallet instead of BTC and now all that BTC is gone! Is there anything I can do?? I sent BTC from coin.me to my LTC wallet at btc-e. Can either help?
BTC and LTC have different starting address for a reason, so the the block will reject it as being invalid and not accept it. You will have to contact whoever directly as most of the time they will have to manually process it but it is not lost.