Shocking service - no communication

Our business have been with Standard Bank since 2005 and we have grown to a R18Milj t/o company over the years. Never had major issue and have the Bank and have been blessed with good account managers. Until today. Our revolving credit and overdraft facility disappeared without any notice or warning, effectively bringing the account to a standstill. After a frustrating 2 hours dealing with the Business customer centre they also gave up trying to contact our branch. We managed to get hold of our previous account manager that now works at another branch and he has, as always gone out of his way to help. He informed us then the facilities expired. No notice, No communication from the bank. I cannot begin to describe how utterly frustrating it is to deal with the branch. Zero feedback. Its time for us to move on to another bank i really had enough.