Prepaid electricity meter

We have been struggling with our prepaid meter for months it does not allow us to read in electricity token it keeps on giving us error code 30, we phone them they come out, reset it then it works for that day next time nothing. We received a new prepaid electricity meter it does the same. Thursday the 25th of January we phoned them again 6 times, they keep on telling us they marked it as urgent and escalating it to the supervisors but no technicians came out our electricity was very low. Friday the 26th my husband took a days leave in case they came out no technicians came out our units were 1.8kw. I phoned them 3 times they kept on giving me the same answer and never came luckily on 0.3 kw the token loaded. Saturday we tried to load another token again it would not load I phoned them again, got the same answer that they marked it urgent and escalated it to their supervisors up until now no technicians came out. This is very bad service, something has to be done to resolve this situation so that we do not struggle like this everytime we want to load electricity.