Re: Are these sentences correct? Can I say change with you with notes?
I would say "refused to change my bill" but not "give me change." That sounds to me (American) as though I gave him $5 for my $3.20 purchase, but he refused to give me the $1.80 that was due me.
Of course, in context, it would be clear enough. "I needed coins for the meter, but all I had was a $5 bill. But the cashier refused to give me change." -- No ambiguity there.
I'm not a teacher, but I write for a living. Please don't ask me about 2nd conditionals, but I'm a safe bet for what reads well in (American) English.