If you ordered an item with 2-day shipping and the timeline does not meet the above criteria, you should contact the seller to discuss a partial refund of the difference between the seller's 2-day shipping rate and standard shipping rate.
It's always best to first reach out to the seller of your item directly to notify them of any shipping delays. If you are having any issues contacting the seller, you can contact Reverb Support and we'd be happy to assist you.