我的帮助？it means my help. Thanks for my help? I think it is not right.
No, the sentence is correct. "对我的帮助” could be translated "the help for me". Therefore, the sentence literally means "thank you for the help for me" If "对” was absent, the sentence would say "thank you for my help"
Oh, now wo mingbaile! Dui is necessary. Xiexie ni!
To add to Benjamin3vald response 对我 means "for me"