Overdraft approved but declined by branch manager!!!!!

Called in and app**** for an overdraft increase and was approved waiting a call from fnb to discuss the interest etc... No call came so I called back and been told the application was closed. Reapp**** and this time it was sent to the branch manager who declined the application due to the fact that the monthly income is not the same. Which business has the same income every month????!!!!! I have been banking with FNB for years and really think its time to move on to a new BAN****!