Billdesk — to remove saved billdeskutil users from paytm

I have been recharging one of my jio mobile numbers from paytm. Means, Firstly I have logged into my paytm account from that handset and then paid the required from my paytm wallet. but now I don't want to pay the same bills from that particular device or from that particular paytm account having this current number. I have tried a lot but couldn't get it.
Please help.