Billings and collections

I have an Edgars account for almost 20 years now and last month i short paid by R285.86 due to an SMS billing system from which i could not retrieve my installment amount. So i estimated. I get a call from Phuleng from ********** stating my account is in arrears and i should pay up. I don't think Edgars have clue in differentiating good clients from bad ones and this approach is not appreciated. I personally will close this close this account and never buy from this group or associated companies companies again. I am not happy about your collection approach.