Airtel — recharge not reflecting in my account

I recharged their 448 rs. Prepaid plan for my mother's number through paytm today at 9:13 pm.. It showed that payment has been done successfully. But she hasn't received any confirmation sms and no amount has been recharged.
I have got an operator reference number in the invoice of paytm.
It is[protected]. Since the complain registration is bit painful on ivr system and i live away from her, it has become a bit complicated process. Also there is nowhere mentioned on the website, how to register complains. Airtel please mend your ways and pay attention to your customers and their satisfaction.
Her phone number is [protected].