Yes I think I will also return to cryptox.pl after the customer support experience I just had in bittrex.

BITTREX SUCK, don't use it. They have moronic withdrawal limits and they stubbornly demand 2FA that requires you to install additional software. Their IT guy clearly is delusional and does not have an idea how to achieve information security without compromising customer experience. They require you to have a smartphone and they go absolutely draconian on any customer who refuses to buy a smartphone or use Google's products. Bittrex is done, DEAD. Was fun when it lasted but now they have messed up. Time to move on to exchanges that don't treat their customers like shit.