What can you do if you feel your ball is unplayable in a bunker? Rule 19.3 gives you four options for relief for an unplayable lie/unplayable ball.
Note that in 2019 a new option became available, and that is stroke-and-distance outside the bunker. Many players erroneously believe that this is the only way you can come out of a bunker with an unplayable lie, but in actuality, you can also take your ball out of the bunker under stroke-and-distance and that only costs a one stroke penalty.