Reliance Jio Infocomm — request for security deposit refund

Address:

Rohtak, Haryana, 124001

I have paid rs 250 +99 on thursday (25 july -19) for change my number from prepaid to postpaid but they have not change number and didn't refund also money but i got a notification by jio on 14 aug’19 that we would like to inform you that refund of security deposit for your jio number [protected] has been processed. Within 30 working days, refund amount will be processed in your bank account.
But till now i didn’t get any refund.