Forgive me please, I was trying to be polite and say 'cheerio'
Nothing needs to be forgiven.
I was trying to say 'do svidaniya' - I believe this to be polite Polish for good bye.
It's actually Russian. If somebody says that to you as goodbye, they are almost certainly Russian and not Polish. Russian citizens do not have the right to live in the UK but being married to a British citizen would give them that right.