I bumped my headphones now they sound bad...

[777777]

One day I took off my headphones and apparently I was a bit too ruff because when i put them back on it was like i was listening through a cup! So I tried fixing it by bumping them again and then they worked, but it was slightly quieter so I risked breaking them and I bumped them some more...this is when things get weird. The sound somehow changed direction so I keep bumping it trying to fix it but I only make it worse now the sound is coming from kinda behind me and it still sounded like crap. I finally get them to sound somewhat normal but they're still a little quiet and the sound is still bad. What should I do? (the headphones are Bluetooth)

 

[ssddx]

you may want to open them up and inspect for things like bad connections, broken wires or damaged boards.