I used to overdraft all the time (not a good thing, but that'* the way my money flowed). 2 things you can do right now.
1) Talk to a rp at your bank. Theymay not remove all the overdrafts, but if it was one instance that you tried to correct, they ay be willing to remove all the repetative ones. This, although not ideal, will help you out a lot.
2) Call up the customer service hotline for your bank (not the branch). They sometimes are more willing to give back fees like that. My old brest friends wife worked at a bank here and she said if you call up the main number instead of the branch you were many times more likely to be credited back without questions because the branch offices somehow take a hit for each creidit they return.
Either way, as stated above it would never hurt to get a timeline of when each otem went thru. It may also help you with either of the options I listed above to convince them of it being a bank error.