Purchased the wrong pass

I obtained a Japan Regional Pass back in July for my upcoming trip this August. Regrettably, I've just come to realize that this pass will extend my travel time from Tokyo to Kyoto. I'm now interested in acquiring the Japan Rail Pass instead.I did notice on the Regional Pass documentation that a refund is possible with a 10% charge, which I'm okay with. However, it does mention that this can only be done at specific pass exchange offices. I'm curious if requesting a refund at Narita Airport is an option. Lastly, if I do proceed with the refund for the regional pass, will I still be able to purchase the Japan Rail Pass on the same day?