Vodafone — UPC could not be processed

Address:

Raibareli

I want port out my number from VI.
When ever I request to 1900 port.
Message come from 1901 is

1- Your request for UPC has been delayed.Please wait while your request is being processed.

2- Request for UPC for your mobile no. 9670XXXXXX could not be processed.Please retry after some time.

THIS IS my postpaid number and I had cleared all my dues. And I am consistently messaging on 1900 port request but they said every time "Your request for UPC could not be processed. Please retry after some time..