Indian Bank — amount refund for online banking

Address: Madurai, Tamil Nadu, 625009

I recharged rs 349 to my mobile number through online banking. So amount gets deducted from my bank account. But i didn't receive any confirmation of successful transaction. And i contacted my network provider and they said that there is no request has been received and they asked me to contact my bank official. Then i contacted bank and filed a complaint letter. They say that amount will be refunded 4-5 hours. But tillnow i didn't get my amount back. What the hell is this.