My server deleted my map and settings

Today, a friend told me that the crashed server, when I checked the settings, everything had restarted, even the maps. Then I used the backup but even so I don't detect the map since it generates a new one, ignoring the previous map (My main map has a different name, instead of "world" it is called "nibbaland"). Is there a way to put my old map back instead of generating a new one?

Sorry for the bad English, I use a translator.

My last backup was from today at 3:00 am (UTC -6:00 Mexico City)

Yeah, I tried like 3 times with the same result.

I've already tried 4 different backups, they all turn out the same way. I'm going to try downloading the map again and upload it with the name "world", I hope it works. I will share my result when I try it.

After trying to upload my map again (Less than 700mb), I get an error that does not let me continue.

I just tried reinstalling from the options tab, I still have the same error. Will the upload speed of my internet (450 kbps) be the problem? Could the problem be the name of the map?

Thank you!. That answer currently worked for me. My server works as before, now I just have to put the plugins back.