Failure to refund my premium

On the 3rd of Aug i paid premium of R480 however i used an incorrect ref number which is my ID no versus my mom who is the premium holder. I only realised this when Sept premium was double deducted. I then sent an email requesting for a refund by submitting evidence of the transfer i made and explained the error. I sent the email on the 2nd of sept until today i have not heard from safrican... Its ridiculous services and uncalled for. Why not respond if you cant issue a refund? What constitute a mute service? Sies! Its discusting nd having to think of how will it be when i need to claim.. I want my refund!!!!!!