write what is remaining before loading new voucher

this is the most perthitic electricity company i know - our meter box is malfunctioning , it shows the remaining electricity and sometimes it doesn't. i called Protea Metering 5 x and emailed the more that 50 times and they dont respond - guys check the remaining amount before loading your electricity - i loaded R 300 and R200 when i had 172 credit on the meter which i check outside on the main box because my meter box doesn't show the remaining amount and the amount didnt change the meter box just stopped working, i spoke to Susan, Mistique, Lee and Hazel is also included on the email but not assisting - when i called i spoke to Godfrey Masindi on the 17th of February . the caretaker told them to come and take the box and check it or change it but no 1 is willing to listen. the HOA is willing to pay for the new box so what is their problem - cheating me of my credit is why you dont want to change this box, i sent this to scopion legal to assist