Spectranet — refund issues

Address:

New Delhi, Delhi, 110016

I request for spectra internet connection and paid for the same on 27.01.2019 (Ref : pay_bp2u3uzzl6sun4). Before they install, i've changed my mind and request a cancellation and refund by email which was accepted (Request no. Sr[protected]). I received an email that the refund will be process within 72 hours on 29.01.2019 and i provided my bank details. But after many email i still have not receive my refund till date. Please help.