cant get my own money

I have been struggling from last month to get my money back that i have payed incorrectly with a cell phone number and i did call the same day. Other banks when its your money you only pay them a fee and they give your money back and that's it. Now seems like even if the other person do not want to allow Capitec or pick there phone up i will never get my money and that is unfair with me. I know i made a mistake but that is to much to pay for it . My ref no is ***3