Paytm Mobile Solutions — delay in changing the registered mobile number

I have contacted paytm customer care multiple times and raised tickets to update the mobile number registered with my account. As i am out of country from past couple of months, the service provider recycled the phone number and my registered number is used by someone else now. I am not able to login to paytm account as well since they don't provide password reset option through email now. Password can be reset by making a call from registered mobile number which gives the other person holding my old number an opportunity to do so, if they want to.
Whenever i contact paytm they copy paste the same reply every time that "currently, we do not support mobile number update while you are not in india, hence we will be unable to update your mobile number in your paytm account".
Can some one please suggest me a way forward to resolve this? Thanks