ABSA overdraft cancellation

Hi,

I have been banking with ABSA for almost 30 years, from a savings, to a cheque and a credit card, i even have a personal loan with ABSA.

I also have an overdraft on my cheque account, in which my salary gets deposted into every month, it obviously covers the overdraft and more. I have a debit order for my personal loan account on my cheque account.

ABSA has cancelled my full overdraft without any notice, I have no money to pay any of my debts or to even buy food. How is this allowed? I know an overdraft is the bank's money but it is an agreement between me and my bank, how can changes like that be made without prior agreement?

I don't know what I am going to do this month as I will not be able to survive.