Someone is repetitively trying to hack my yahoo account, help?

Over a period of about 2 weeks I got 3 emails saying someone was trying to reset my password, finally on the 4th attempt they succeeded, which really upset me bc my password was 'strong' and both of my security questions were not ones you could merely guess (aka favorite animal is 'dog') They were names and a specific location. I got back into it (bc the person wasnt wise enough to change alternative email or security questions) and changed both questions and my password, all 3 to even harder ones. That was about 2 weeks ago. Now today someone is attempting to reset my password again. Considering they got through the first time when my security info was 'strong' I really have no faith that my account is safe this time. Yahoo says that when an attempt it made a window of 7 days is opened up in which you can reset your pw through the security questions and if you log into your account, that window will close at that time (early). Well its summer time, i have vacations planned over a week long and i cant be responsible for logging in and fending off every single attack the second the person attempts. There has got to be a better way. A way to disable password resetting completely except through another email or a cellphone number or something. Or alert yahoo that suspicious stuff is going on so they watch it better. Is there a setting that can help? Or a way to contact yahoo support about it? I refuse to believe such a big name email provider has such futile protection.