Just want to share my recent experience, see if this is what you have experienced too.
recently one of my frivole earring post got loose from the screw, so i asked my SA, can you please solder it so it won't get loose again? Her response: yes, we can, but we are charging $180 to do it. I said: but they are purchased within a year, I thought it's free of charge within a year. she said: new policy, doesn't matter if it's within a year of purchasing, we will charge $180 for soldering now.
I was disappointed, only asked to tighten it, not soldering, as I didn't really want to pay $180 to do it.