I sent work permit renewal to wrong address by mistake.  I did not know recently the address was changed. what is going to happen? do I need to send it again? or does it only delay to process work permit renewal? please let me know. in 2 months my work permit will be expired. Thank you.

If you have the phone number of the wrong address try calling them and letting them know the situation and see if they will forward your application. I would say send it again to the correct address in case.