Hi @Diron
A long shot but try a soft reboot by turning it off and on and check the speaker ports for dust / lint.
Check that no case is interfering.
Possibly try a Factory reset after creating a back up. Obviously this wouldn't help if this does turn out to be hardware related but it's worth a shot IMO.
Take Time / Date stamped pictures of the device to show the condition you sent it back in and one of it turned on if you can and perform a back up to preserve your data as they'll most probably flash the firmware. Ask the store employee to note its condition on their system.
From Vodafone "Also make sure when sending your device for repair that you keep hold of your SIM. You also shouldn't send your memory cards, battery and/or back cover (if they're removable) - if these are included with your phone when it goes for repair we can't guarantee their return."
Link > How-do-I-return-a-faulty-phone-tablet-or-accessory.
Just to add that the manufacturing warranty wouldn't cover any issues resulting from an accidental drop / water damage.
Home Insurance and some bank accounts provide cover too. Excess fees and T&C's would need to be checked.
Current Phone >
Samsung Galaxy s²³ Ultra 512gb Phantom Black.
