Paytm — mobile number hacked by other user

Dear Sir, Today noon suddenly I received a message contained six digit code and after that some other person called me from the mobile number [protected] and asked about the code, I said him the code and then I received two massages related to balance transfer from my account, which is neither done by me or I needed ever. Now when I am trying to log in through my number [protected], it is showing there- this number is registered with another mail id. So kindly arrange to remove my number connection with other mil id and connect with my original id as [protected]@gmail.com and oblige.