I ordered a case from amazon and its first class mail?

I added my apartment address but I forgot to put my apartment number. Additionally my apartment does have an office will they deliever it there instead. And I really don't have time to contact or go to my local post office, the sellers told me to do that. I'm worried that I won't get a refund because my cases for my iphone didn't come in.

They will probably return it to the seller if they don't find you or I'm sure you can call the post office instead of going in. I'm sure since you contacted the seller he/she can resend it with the right address