Just an update, got my LTC back. Took quite a while, but oh well

I can tell you guys that I've done an LTC transaction on the 2nd of January to MercatoX and it never arrived (currently @ 4083 confirmations).

All my other holdings on the website (mostly dust) were set to 0.

No response whatsoever so far.

I would refrain from putting money there until you stop seeing complaints or their Facebook/Twitter page.