have you tried call centers?
Might be wiser to keep travelling to England to work than work in a call center. It's ok work for a kid, but it's not going to pay enough to live a semi-comfortable adult lifestyle in Kraków. If the OP had IT skills, proven sales experience or fluency in in-demand languages, he might be able to earn enough to make it worth while. Otherwise, it's probably going to be cold-call sales or low-level debt collections for very low wages. Frankly, those jobs are very unpleasant, and do absolutely nothing toward building a career.