Actually, the reactivating feature of the ad is not currently available.
If you would like to republish your ad you can wait for 30 days from the ad posting date. After that, you will find your ad placed under the list of inactive ads where you will find beside it a activate ad tab that you can click on it so your ad appears again with a new date.
Also please don’t deactivate your ad and do the same ad once more as it’s considered a duplicate and it will be automatically rejected.
Also, we advise you to never delete your ads permanently and do the same ad once more as this also considered a duplicate and will be rejected automatically by the system, so make sure you only delete permanently the ads you have already sold and will never post about them again.