Jio Telecom — transaction failed amount deducted

I have recharged my Jio mobile number through myjio app with 399rs after applying coupon it was 50Rs off on it.
So it totally paid rs 349. But the transaction got failed and i tried again to recharge with same amount. But the both transaction got failed and rs 698 .
According to jio my amount to be refunded within 3-10 working days it have been more than 10 days still i haven't got my deducted amount back.I got non satisfactory results when i contacted jio, billdesk and bank.
Transaction id details are below.
Date: 25/12/2018
Time (approx) : 20:10 -20:20
Amount : Rs 349.00