I have been using one last 2 years and it's been great, only recently the back wheel is damaged and I'm looking for spare one, do you know where I could buy one please?
I am sorry, really, but new stroller wheels (or other spare parts, for that matter) are not easy to come by. And that is even more true with these cheaper Polish prams. They are simply not sold in shops or online stores.
What I would do is to contact the seller you bought your stroller at - he should be able to order spares from the manufacturer, BabyActive, or tell you who would be the distributor in your country.
Another thing I would go for is to contact the manufacturer directly at firstname.lastname@example.org.
I wish you good luck!