Line has been disconnected ahead of debit order

My debit order is set to go off on the 3rd of every month, which it does without fail. Last month, I received a bill which did not make sense and was more than double (R2000) my usual installment, not wanting to bother phoning your call centre - I ended up paying R700 ahead of time and leaving the remaining balance of R1300 to go off on the 3rd of February - my expected debit date. This morning, I woke up to find my line has been disconnected - it's the FIRST! How on earth can you disconnect a line when the debit order goes off on the 3rd of every month!? So now, I have made the manual payment of R1300 & have to wait 48 hours for reconnection which means I lose income for 2 days and I have to worry about you debiting my account on the 3rd, again. Your service is **********! I am not the first to have experienced this - I have friends who have also had their account disconnected before their debit order.