Appaling service

I would like to bring to your attention the appaling service received from STSS. I needed to load lights last month and they said the munipality was offline and gave me R100 emergency voucher which I paid back into their ABSA account. I loaded lights again and it went in fine, then I needed to load again and they blocked my meter saying I owe them R120. Spoke to Thabo he said it was their mistake and gave me R50 emergency lights again which I paid the next day at ABSA. Tonight when I want to load lights from my bank account the same Thabo informs me I owe them R120 and that I should stick to buying lights using the same method. He was very rude and aggressive over the phone. This behaviour towards clients are unacceptable and uncalled for as I pay my rent every month and can't owe on electricity when it's prepaid. I demand that this matter be resolved immediately because this is making my life uncomfortable and its a waste of my time and airtime calling STSS and emailing them all the time when they clearly can't do their jobs.