Poor customer served and no sense of urgency!

I submitted a request to decrease my overdraft on the 29th of March and that request takes 1 business day and no one attended to it. On the 8th of April I submitted the same request and no response. On the 12th of April I resorted to calling after trying to call them for so many times without any assistance as the agents would transfer me to the relevant department but no one speaks to me until I decide to hang up. On the last attempt done on the 12th of April, the agent told me that the change will reflect by the end of the day. Until today I have not received any help!!!