Aircel — upc not provided

I sent port request on 1900. Firstly i didn't get any reply or code. On contacting customer care, they told me to resend message & wait for 24 hours. I did the same but didn't receive the code even after 27 hours. Customer care guy told me to send message again. How long should i continue doing it? Also there're no network in assam from past 1 week