Very bad debit order update system

I have updated my debit order date to a different date which is the 1st of April the message after confirmed that the debit order date is updated. This before the debit order date. I relax knowing that the debit order date has been changed. Now the internet is blocked due to payment due, yet the 1st of April is on Saturday. the first consulted logged a ticket, when I call to follow up on the ticket log the lady didn't even try to take the ticket number and check what's going one she just insisted on telling me that I need to make a payment now even though the debit order will go through on the 1st of April which doesn't make sense to me that m paying now for March invoice which will again be debited on the 1st of April. The system indicates that the march invoice will be debited on 1st April if I pay now what M paying for? am I paying or April then on the 1st of May again pay for April? You can call me on ***