Bharat Sanchar Nigam [BSNL] — cellular number confirmation/activation

Website:

selfcare.bsnl.co.in/tungsten/UI/facelets/login.xhtml

I am trying to login to self care web portal. I am a registered user of cswc. I did not used it for a while. At the time of initial registration, my cellular number used for the same (Registration), is different of what i am using right now.
When i opened the site https://selfcare.bsnl.co.in/tungsten/UI/facelets/login.xhtml. it is prompting to enter my user id which is my new e-mail id, then asking to enter captcha of letters (Capitals). Then click login, next screen opens to enter password along with the already existing user id displayed. Then click next tab in the bottom right of the screen, which opens another screen, which states account details which displays blank details, as i have not yet entered my account details, where at the left bottom of the screen has a tab named add account details, then press next tab at the bottom, then the account details screen opens to enter the details of the account land line, where we can choose wireless (Land line) or mobile, then normal/eps customer, which i have chosen wireless and normal for respective fields. Then enter other fields like customer id, account number and the service id (Land line with std code) then click next tab which opens another screen for account details to confirm mobile number initially registered with the self care portal, which displays a portion of the number for example 11xxxxxx11, then when you fill the available mobile number in the confirm mobile field, it will send an otp to the initially registered mobile number. Then the account is updated with the latest details. Here i am stuck with the confirm mobile number, which was deactivated for not using it for a long time issued by airtel, my initial registered number, so i called our customer care service of both landline and broadband services, and brought to their kind notice that my initial registered mobile number (Sim) is no more working or with me due to the deactivation for not using it for a long time, also initially there is no gsm or gprs service entailed to that old mobile number, that is the same time when broadband is not in use or installed, only dialup modem days.
So i requested them to update, reset or activate my new mobile number, so that i can add account details and use it as usual. Even in my customer profile has options to update or edit my e-mail address and mobile number, still, when i go to that very last screen to confirm my mobile number, it is not showing the newly registered or activated or reset number to enter into confirm mobile number field, so that i can enter the otp sent to my new mobile number and update or register my account details and use it here-forth.