I have dropped my favorite ef-m lenses (22mm and 11-22) several times. I have them since 2014. Both are functional with AF but you see dings and feel it in manual focus.
Is there any service center for such issues? Will it be affordable?
They have a few service centers, not all of them service lenses. For example, if you bring a lens into the Jamesburg, NJ facility, they'll ship it to VA for repair. Their US HQ is in Melville, NY – I don't know if they actually accept products for service there.