Hi, I am terribly sorry if this is a wrong place to ask that but I've sent some ethereum using myetherwallet but using option Send Ether and Tokens, instead of "Contracts". Is there any way possible to claim my EOS tokens or I've just foolishly lost them? (it was a small test transaction, yet I would love to see it succeed).
No, you did it correctly, don't worry. Did you send it today? You can only claim your tokens after the token period of the day ends, which is 6 hours 45 minutes from this comment.
What you'll do is go into the contracts section, select the EOS contract from the dropdown, and then change the thing you want to do at the bottom left to "claimAll", you'll be asked to load a wallet, so choose the one you want to store your tokens on. After that, click the "Write" button, you'll be asked to send an amount of tokens, but just leave it "0". And set the "Gas Limit" to around at least 3000000, or the transaction may run out of gas and fail. When this transaction completes, the tokens will be associated with that wallet and you'll see them on the right side whenever you log into myetherwallet.
I would recommend against buying into the token sales though, they always end up more expensive than just buying the tokens on the exchange. (The amount of tokens you get is determined by how many people contributed by the end of the 23 hour period, the more people, the less of the share you get.)