Nextra Teleservices — refund amount of modem

Hello
My customer id is 02060419 with the name mohammad ahmad farooqui
I discontinued using nextra around september, 2017 and requested for refund of modem amount.
Since then, i have been making several calls for the update of my amount but have not received my amount,.

Account no:[protected]
Ifsc code: utib0sjcb01

Please look into the matter.
And speed up the process of refund