unfortunately it no longer is your tribe - when you "deleted" it basically all that happened was you left that tribe. think of the "tribe" as a separate thing - and once created there really isnt any going back to how it was before, as everything becomes tribe owned. there are ways to limit some things, like having dinos personally owned - i believe they would've left the tribe with you but i cant say for sure, never tried it. i have over 6k hours in ark and i have always treated "tribe" the same way - sacred, not to be meddled with or changed ever - i wont even rename my tribe because i refuse to take any chances of losing stuff. i understand that you were not aware of how "tribe" functions and this happens a lot with new players. i have seen it many times on the officials i play on and i always give the same advice:
- if you are solo, once you've created a tribe never ever leave that tribe for any reason. never join another tribe to "help out" - if you are around other players and see an invite to another tribe do not accept - just leave. being solo there is no one else to invite you back to the tribe if you leave - and as you've seen, the tribe will persist just fine with no members.
i realize this is too late to help you though, and for that i am sorry - you can try submitting a support ticket if you are on Official (not Legacy) and they may be able to assist you. realistically though - its time to start over - its a hard lesson to learn but at least now you know.
once tribe always tribe
edit: as @d1nk said, if you are playing singleplayer you can get your tribe back with a couple simple admin cmds - quick google search will tell you how