Standard Bank Lying!!!!!!! Poor service

I am totally disappointed in Standard Bank. I have been banking with them for many years. I app**** for a overdraft over the phone and the lady told me that i qualify for the amount of R34000 would i like to accept? I then told the lady that i will rather take the amount of R20000. The day after i phoned again and said that i decided to quickly and that i would like to make the amount R34000. They then told me i have to go to the branch i then went to the branch where they said it has been declined. It doesnt make sense because if i have accepted over the phone i would have had the 34k the lady at the bank then told me that she will motivate and give me a call the following day. I waited for the call but no one called i then went to the branch again where the lady told me sorry but she cant help me. As have already been "exposed" it doesnt even make sense my point is if i have accepted the 34k over the phone i wouldnt have had any problems now!!!!!!! Totally unacceptable and ill rather go to a different ban****