Have you checked the ZRH website? That will list if there are any bank counters (rather than ATMs)

But I would also check what the procedure is in Switzerland for exchanging withdrawn notes for new. it may not be as simple as going to any bank. to swap them and bureau de change may not accept them either to be converted into another currency.

1,000 CHF seems to be worth close to £880/$1,100 so a substantial amount so something you need to do properly