LACK OF CUSTOMER SERVICE

Very poor service,I have been calling since last week to be assisted with the state of my personal loan after depositing a lump sum of money.I have been calling and then sent pillar to pillar speaking to 5 different people.When a verification message sent to me the call gets cut off.I have verified with them they have my numbers do they call back No.Then I do this all over again still same issues COME ON NEDBANK this is incompetence I AM AN ASSISTING CLIENT how is it difficult to call back