this happend to my old bottle i thought it woz just wer ders no air in it, wen it woz filled up u could unscrew the bottle but wen it had no air in it it just span like urs did ?
ok before you think its all done. undo the grug screws take the collar off and give it a wipe to remove any burrs. clean the thread as well. the put back together you dont want any bits of metal in there.
if the grubs have dug into the collar then bits will bur off. and as you were twisting it to try and get your bottle of this may have happened. no threadlock
Also do not put any oil anywhere near anything. And no thread lock. Be meticulous when cleaning it, and if in ANY doubt, ask someone for help before you test it works.