You have to follow the rules and regulations of the forum before you post, and also do not post a trash, if your post is not meaningful to the community the admin will delete your post, because the post have not meet up to the forum standard, most newbies experience deleting of post by moderators because they have not acclimatise with forum methods of posting, each of the post have it proposed sections that's good for it, so if you don't want your post to be trash any longer just make sure you post innovative things, secondly, make a proper research before you post.

You can't reach admin because admin deleted your post, sometimes it a bot that delete posts often, why if your topic is not that relevant it will be move to off topic section, that has been the methods of forum

If the post is important to the community it wouldn't have been deleted, and it's not first time posts has been deleted by admin, secondly, statistics have it, that 16 of your post has been deleted, so it's best time for you to look into what you have been posting on forum, if it's meaningful or not, when you post quality post it won't be deleted.