***** voucher redeemed

I did an instant money in total was R2800 , and my number it's closed due to some certain reason no one has access and when I call for the number and pin to be resent to my new number they say it's already redeemed I don't know what needs to be done , the standard bank instant money was redeemed not by me ,I query about it the say I have to go to the police station for subpoena and the ***** case wasn't open And When I call they said my 2800 was redeemed by someone who has standard bank money e-wallet but nothing is actioned no ***** case opened on there side I need my money back that's all.