Incompetence and not Trustworthy

I went to their branch at Jabulani mall in January 6th change my debit order date on both my life cover and educational plan from the 1st to the 26th, I was assured by both consultants who helped me that cause they have debited January already on the 4th the next debit will be 26 February to my surprise they tried on 1st Feb. I then send them email to ask why they debited on the 1st cause I changed dates and to debit on the 26 as agreed. When I called them they told me that I need to pay 2 premiums on the 26 which one is for the 1st of Feb and the other for the month of March when I asked if I am billed a month in arears, advance or current was advised by 1of the managers that I have to pay double cause 1 Feb debit order which was for February was unpaid I then told him that which is why you are going to debit it on the 26 he then promised to log a query then call me back. On 26 March they didn't debit when I called them on 30 March to asked why they advised me that because my life cover was cancelled due to reversed 1st Feb debit when I asked what about the one they debited on the 26 Feb they still said is for March then Brian manager promised to call to date nobody called.