Reliance Communications — unable to send mnp request

I have been repeatedly trying to send msg for portability to 1900 from my reliance gsm number but it fails sending. I have sufficient balance but still the problem prevails. I tried calling the cc but unable to reach the executive. Plz suggest any other way to obtain the mnp code. I dont want to lose this number as it is very old number and no recharges are available in my locality for reliance gsm. My number is [protected]
Thank you in advance.