Poor Customer Service

I have sent numerous e-mails and several phone calls regarding my account that is stating that I am in arrears since January . To my amazement I have been getting sms stating issue have been resolved. Lately after 10 emails I have received an email that I owe R85.70 of which no one can explain this R85 my account is on a debit order of which I think its interest from arrears .I went on and I paid R90 sent an email again followed by a phone call consultant said there is nothing wrong with my account it has been updated followed by sms .only to find the account is still in arrears going for the 3rd month now.I have asked for management was told they work from home cannot be contacted by phone will have to wait for an email .I did not expect this service and such lack of respect integrity and proffessionalism towards customers