how is it possible to load a ekurhuleni meter (which i dont have) onto the Unipin messageing centre and get told that the voucher is redeemed and nothing can be done

purchased R500 Unipin prepaid on 2/12/19, like i do every month around the 1st or 2nd followed the prompt like I always do: *120*41589*pin nr*meter number# and call. a few minutes later i receive a message and it said City of Ekurhuleni, I thought that was strange but since it had all the other details, i did not give it a second thought. I assumed the Unipin had changed their format. What really got me was the number of Units it stated 343.40kwh instead of the usual 209.70kwh that i normally receive for R500.00 i then proceeded to enter the token numbers which would not load, since it was 21.42pm i could not get hold of anyone. i phoned meter mate on the morning of 3/12/19 and got feedback from customer care stating that i had loaded the incorrect meter. The more I told him that was impossible he kept on saying it was for Ekurhuleni. I told him what i normally do before i send off the message and he said well Unipin says nothing can be done and please forget about the R500. Could someone please help