customer complaint means nothing

am a client and been in business with this company for 2 years, I gave them business and never did I give an instruction for my bank account not to be debited.My debit was on the 01st of very month a POC was done for me in march and I changed my debit date to the 25th .To my shock last month I receive an email from some collection company sending me mails that I need to call them for an arrangement account is with them. I contacted mixtelematics asking their finance who gave an instruction for my account not to be debited, the collection company they referred my account to I emailed them as they gave an email address and contact number to contact them. All I heard from them was give us a ref number ,I gave them my id number and contact number but my query till today not resolved. I went to an extend to contact the company I have the business with imagine I sent email my emails till to date no respond I called spoke to a consultant requesting answers all I had was me being blamed while I gave instructions from the day I gave them business to debit and they want to push the blame. I requested answers, why my debit removed why am I being blamed and my account handed over and who gave instructions not to debit. The consultant gave some stupid excuses and with those I was in the wrong. You can even tell her reasoning she cared less and thought I know nothing about my account. I work as a credit controller and am shocked how the customer service of this company is.They careless and I mean nothing for 2 years I gave them business i gave them business my query means nothing.

I was told a request was sent to a supervisor and I will get feedback am still waiting. I call for feedback am told awaiting supervisor. I work at the same industry an am so shocked of how I mean nothing and my query means nothing to this people. Just yesterday I received sms threating me and telling me of account in arrears and being handed over to call for an arrangement meaning whatever query I have that's non of their bussiness.The people I've called to query the emails I've sent are just being overlooked ,imagine if I will need help with my car. This is the kind of companies we put our trust and life to assist in time of trouble. If they cant assist with just a simple query take responsibility that their system failed them or consultant messed up and fix my account do necessary credits and approval but no my query means nothing. I also feel the same I no longer want a thing to do with this company