Paytm Mobile Solutions — change for mobile no but they do not take action

Address:	01672
Website:	paytm.com

Dear sir/mam

i have an account in PAYTM.Last month my ragister mobile no has baind (not in use) because my number is tata Docomo now Tata Docomo is band in all india.then request to paytm change my no.when i call them they say that your no has change in 24hrs from your call.i call them 10 time every time their excutive telling same answer but they did not change their no.and my Paytm A/c balance is more then 4000 please kindly take an action