I wanted to change m...

I wanted to change my payment method from normal payment by card to a debit order...I usually pay on the 6th of every month but now my portal says on the 1st of every month. Called vodacom and I was told it is the way the system is made. That I should pay the new amount even though the system now says awaiting installation though I already have the device installed. I have paid but my profile still says awaiting installation