It's showing from my POV that am in no team and no team exists by that name but when I asked other player he said he is in rival with my team and when I went to my claim which was my base , I had merchant there , it says Uchihas's merchant so pls help me out with it 

Hi,

Can you give any details on what you did for this to happen? If a team is disbanded before ending a rivalry, the rivalry would still keep running. Same thing with merchants & etc.

Unless you disbanded your team or the files corrupted then it's very unlikely your team disappeared just so. 

I was not even online atm . when I logged in I saw my team was disbanned dunno how