Costco Wholesale interview questions

I have been applying to costco for 6 years cause I've heard so many ggod things. So i tried applying agian and i actually got a call back the same day and was asked to come in the next day. So standard behavioral interview. After that they seemed incredibly impressed ( i have 10 years retail experience so im way over qualified). They said they would be in touch for a 2nd interview, i got called back for a 2nd interview and did that and said i would hear back with a job offer or they would send a letter in the mail daying i wasnt accepted. Well its been 4 weeks since my 2nd interview i haven't got a call or letter in the mail. I called and they had no answer so it is very unprofessional of costco to make me go through this and not have an answer after 5 weeks. At this point i know i didn't get the job,but at least be courteous and let somebody know away instead of making them wait on glass