OVER LIMIT

I WAS ON VACATION AN NOT REALIZING I WENT OVER MY CREDIT LIMIT BY 300.00. ABOUT 2 WEEKS AFTER I GOT HOME I RECIEVE A PHONE CALL FROM THE CREDIT CARD COMPANY ABOUT THIS MATTER AN I PAID THE OVERAGE RIGHT AWAY, AN THEN I FIND OUT ON MY CREDIT REPORT I WAS PENALIZED FOR THIS BY A DROP IN MY SCORE. I DONT THINK THIS IS FAIR AN WOULD LIKE MY SCORE TO GO BACK UP FROM THIS MATTER.