electricity voucher

I purchased electricity via my banking app and instate of R 300 I typed an extra 0 which made it R3000, called City property for help since I rent one of their apartments and the electricity is for the apartment, I was taken from pillar to post the whole morning and spoke to a very rude consultant. I was told to call my service provider(Ikhwesi) they explained why they can not assist with a refund since money goes to city property and they can only assist with a voucher for R300 called city property again and was transferred to Tricha Botha property manager, she sounded like someone whos willing to assist since I couldn't get help al morning, she sent an email to the prepaid department. The response was that they can not assist me , the voucher was generated and the transaction was completed, I was told it works in a similar way as Cell c airtime. I then called Tricha back asking for a way forward and clarity to why they couldn't assist and she started raising her voice and changed her tone of voice, All I wanted was help from her not attitude. I stay alone and honestly, do not need electricity for R 3000 , I still need to pay rent for the apartment, have other responsibilities and need to buy Grocery.