Electricity voucher

Good day,<br> I have complain this before via telephone: Reference number: ***. I have purchase electricity and didn't get the voucher number. I have call in earlier today, but they try to connect me to the relevant department but not getting through. I cannot accept this service anymore. How can you purchase electricity but get send to the wrong cell phone? I am still waiting for the voucher number and I urgently need the number. Please advise asap.