Bad billing service

This company must have the worst and *********** billing department I have come across. I have been a customer since it was only Mnet and have been paying my account via EFT since then without failing once. For the second time now in a short while, I get the SMS that I have not paid. So I email my proof of payment made on 28 February to the appropriate email address plus to two additional ( senior? ) persons in accounts. Day before yesterday I receive another SMS, I again send my proof to the three addresses . Yesterday, they cut my service.! I immediately phone the billing department and kick up a fuss. They reconnect my service after establishing that they " made a mistake". I then send them an email expressing my dissatisfaction to the three email addresses, and request an acknowledgement of my email and for a Manager to call me. Needless to say.....no response , except looking at my account, they have debited me with a R 50.00 reconnection fee ! Who do these people think they are and do they think they are dealing with *****s ? I clearly mentioned in my email that failing a response from them I shall seriously consider cancelling this outrageously priced service, which I am now sure I should . These guy's are only interested in taking your hard earned cash and in the process causing the customer as much stress as possible. SHAME ON YOU !!!!!