Debit Feature On/Off Discrepancy

I had called Orange County Credit Union early in the year to have my debit overdraft feature "turned off".  When looking over my account online I realized that it had not been turned off.  I called them late May to "insure" this feature was turned off, spoke with them for half an hour about my concern asking to please turn this feature off as I did not want to get any overdrafts. A couple weeks ago, I noticed my debit card charges were going through and I was getting overdrafts.  I called again.  They said "yes" I had asked them to turn this feature off, but somehow it did not get turned off. I asked if they would refund my overdraft charges. After admitting they made a mistake they did not return all my overdraft charges. Then I called them again today, and they said it was not in their records that I ever called to turn off the feature, after the time before the agent said it WAS, INFACT, in their notes that I had called to have the feature turned off. Then it was not in their notes? Yikes....