if you do really have the "Seed" that means you can recover your funds. just download the latest version of Electrum-ltc and instead of creating a new wallet in first step, choose "i already have a seed". that way you will have a wallet that contains the private keys and you can recover your funds.
there is no other way.
a watch-only wallet is not something that you accidentally make. you either gave the wallet your master public key (MPK) or gave it only addresses to watch instead of having seed.
the thing is that i can choose "i already have a seed" because when i open de downloaded file it instant goes to my watchting only wallet with the amount of coins i bought.
Again i'm not sure what i did, but i did made a wallet only. i didnt really read into it tbh before installing.
i must have gave that watch wallet my seed before making it.
I'm a bit confused now. I dont really know much about this subject, so yeah...