The People's Operator has a US based customer service team. They are positioned as a carrier who is socially conscious and they will donate 10% of your monthly bill to a charity of your choice. You don't need to do anything, TPO will take care of it all for you.
Seashells contain calcium carbonate. The calcium carbonate reacts with the acid in the vinegar and causes carbon dioxide bubbles to form. Even though the acid in vinegar is weak it can, over a period of time, dissolve shells.
Most turtles have shells like houses that they can pull their heads and limbs into. But a sea turtle can't pull into its shell at all. The shells of most kinds of sea turtles are made of bone and cartilage (the same bendable stuff your ears are made of.) These are covered with thin plates called scutes. But the leatherback's shell is different.