You will never receive an acknowledgement. Not when the site is accepted for a listing and not when a listing is rejected.
We also do not provide any service to get websites indexed.
You suggested a website to DMOZ and we are thankfull for that. One day an editor will look at the suggestion and decide what to do. When that will be is something no living being knows. It might be today, tomorrow, next week, next month or even over several years.