Disgusted In the Customer Service From Consultants

So in July and August 2014 I went to the blue route Edgars branch to pay my account like any human person does. The person in the store at the pay point tells me I don't have a installment due, I then tell her okay but here is R200.00 put it onto the account the next month the same. Then in September 2014 there most unprofessional debt collectors department start phoning me 3 times in one day saying I'm in arrears with my account and I MUST go pay today. I then ask them how can it be when last month they told me I don't have a installment I asked that they investigate this matter No ONE get back to me and every stupid debt collector tell me they will get a manager or team leader to phone me but no call up until today. Then I refuse to pay as I want some explanation as to why I was told that then they just lower my credit and want to black list me and then on Saturday 9 May 2015 I go back to blue route branch to customer service stood for a hour waiting for someone to help me then tell my story go to the manager she says this is a query above store level a guy by the name of Faiza Patel send me a email say I made short payments what the hell. I need the CEO of Edgars to phone me!!!