Can't unlock battery cover for Cyrusher Aura

Have tried moving battery while trying to turn key.

Tried slapping battery gently with no luck

Tried a little wd40.

The key wont even budge the lock

I haven’t fell off the bike or bumped it. The lock is just stuck solid

Have only done 140 miles on bike and only bought it a few months ago. I like to take battery off to charge it so im not happy with the situation .