Dishonesty and lack of communication

So I have 3 contracts with cell which the agreement is that they debit on the 25th of of every month and I'm getting my monthly statements. It all went fine until August or September where I got the statement to say I don't need to pay anything and that month nothing was debited as per statement fast forward the following month I get debited twice which was an inconvenience as I was pregnant and working on a tight budget. December comes I get a message to say the debit order will run on the 20th, December comes and my debit order went through. Come January I get a call to say my account is in areas, how I don't know. You call the contact center you are told it was submitted however not debited, why? No reason on the system. Like really? What an inconvenience