Paytm introduced a new toll free number 180018001234 for their customer service and for more Paytm service details, and now you can also use paytm without internet check below
How to Use Paytm Without Internet
Paytm Toll-Free Number: 1800 1800 1234
Call on 1800 1800 1234 from your registered Paytm Number.
You will listen to a voice which will be told that you have not set PIN for your account.
Then will be ended.
Then you will receive a call from Paytm.
Select Language by entering 1 for Hindi & 2 for English.
Then the Robot will ask you to enter PIN you want to set for your Paytm account.
Enter any Four Digit Number
After entering PIN, Press 1 to confirm.
Finally, you will be asked to Pay someone or end call.