Not receiving token

I bought a R500 Unipin voucher from Engen in Wierda Park at 18:50 on 18 February. I submitted the meter and voucher numbers as prescribed. I have sent a query 8 times via SMS and 6 times via email in the prescribed format and have not had the courtesy of a single response. We have now been without electricity since 22:00 last night. This is shockingly bad service.