Debit my account i dont owe you anything

I took a router in dec 2018 i requested my debit order to go thru on the 28 dec onwards. Yesterday i foned subscriber collection spoke to Chantey or Chantel and she advised me that it will go thru before 1pm yesterday until today there is no debit in my account i phoned again today requesting to speak to a supervisor your consultants refuse and drop my calls. This is a new contract all am asking is to pay you. These are some of the reasons i left mtn but you are just like them. I do t want to owe nothing deduct your money from my account.