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They responded to my email pretty fast. Not with the answer I hoped but they at least responded.

Email them at: support@blocktrades.us

I think I know what happened, for me, my ETH address is on Kraken, and this trading platform makes the deposit when there is more than 0.05ETH on the deposit address, but I have only 0.048 then the deposit will only arrive when I exceed this amount.

I sent more eth on the address and I received it well ^^
So that was it!