Failure to credit my prepaid electricity account

I contacted UAS on 1st June 2015 to confirm my account balance. They informed me that I need to top up my account. On 3rd June I transferred money. Thereafter, I got 2 phone calls from UAS consultants informing that my account is in arrears, I explained that I had settled it. . I explained once again that I had transferred money. From there on I got daily sms's that my account is in arrears - I sent e-mails almost daily to UAS without any resolution.<br> I was told there was a system error, then there were problems with the account numbers. After about 2 weeks I was informed that my account was actually in arrears - I queried this as my account was never credited with the money I transferred. After more investigation I was informed that my account was not to be in arrears it was an error and my account will be credited. From there on I continued to get sms's that my account is in arrears, I was told there are system hicccups. This contiuned until 23 June when I was told again my account is now in arrears - I then transferred money again. My account is still in arrears and I am getting frustrated as I need to keep e-mailing UAS daily. This in my view is not acceptable customer service