Severe incompitance, uselesness and bad attitude

Over the last 6 months I have had nothing but problems with Telkom mobile, their billing system has been atrocious. Every time I approach their customer centres for help I get a different story, severe incompetence and poor service. I have been overcharged, Telkom doesn't fetch money through the debit orders, I am told to pay moneys directly and fax proof, which I have had to do the last three times. Last week they suddenly went into my account and withdrew a double payment . Today I received a call from a debt collecting company to say that I am in arrears to the amount of R595-00. My bill is only R199-00 per month, where do you get this amount from??? I am frustrated, angry, upset and pushed to the limit! Nobody at this company seems to know what they are doing, and nobody seems to want to help. I am cancelling my contract as soon as possible, and I will NEVER have any business with them again. Please be aware that I will not keep quiet about your lack of service and gross incompetence! People say we must build this country, yet with this kind of service, how will we ever accomplish that??