right person is okay, as far as I'm concerned. Proper might be a little more polite. But I would say refer rather than forward. We 'forward' emails and other things, but we 'refer' people.
If you don't deal with this sort of issue, could you kindly direct me to the right person?
You can substitute 'please' for 'kindly' if you like it better that way. Also, as Philip has already mentioned, you can substitute 'refer' for 'direct'.