Telkom communication poor service and debit levies ridiculous I want to eat I don't want debit orders

I have a problem every month my bill is sent on the day of payment so my installment is 1432.00 I leave R1600 in the bank so the debit does not go off I then send in a call back request on the 6th March they phone me to tell me they are off line and will phone me back...I decide to make a eft payment till today no call back from them now my service is suspended why I don't know because I did pay them and if a debit does not go off they charge R250 which is really too much it has been a problem for a while now not the first time this has happened I eve wanted to cancel the debit order because it is easier to eat but they won't allow me I really don't want to pay R250 extra every month this is ridiculous. And it affects my credit score also please what am I to do I am frustrated because off this