what brought you to Krakow in the first place?
do you have Polish friends in Krakow?
Do the have a TEFL cert?
What did you get sacked for? Do you agree with the school's decision that your teaching sucked?
What did you do back home before coming to Poland?
The easiest way out would be to find another school and get some lessons in. Don't tell them that you
were considered not good enough at your previous school of course
failing that, it is the life of the tour guide for you but winter is not the best time for walking up to
groups of tourists and chancing your arm but worth a try
alternatively roll up at a medium sized company and offer to sell on commission only calling prospective clients in the UK
then try and find a salaried job in sales after a month or so.
if you do not have a support network around you in Krakow you would be better heading for home
being alone, broke and friendless (if this is the case) in Poland during wintertime is not a fun prospect
if you really are committed you could maybe try a less glam town with less competition like Katowice for example
Anyway, the best advice is indeed to go home - if you can't find work off your own back, the work isn't going to come to you. Poland is a very competitive place - what gives you an advantage?
On a serious note -
so this was your warm, funny side that we are witnessing?
talk about kicking a man when he is down
so he tried to blag it as a English teacher? big deal
it is not as though he was chancing a job as a neuro surgeon based on having a city and guilds in woodwork