A good number of disposal call-outs turn out to be something you can sort out yourself in a couple of minutes, so it is worth a try before you ring anyone.
Try this first
If it hums but will not turn, the motor is fine and something is stuck. Switch the power off at the wall, use the little hex key that came with the unit to free the flywheel underneath, then press the small reset button on the bottom. If it makes no sound at all, the reset button on its own often sorts it. We would rather tell you this than charge you to come and press it.
When it really is finished
If water is coming from the body of the unit rather than the connections, it has rusted through and cannot be repaired. If it keeps tripping even after resetting, the motor is on its way out.
Older kitchens, older drains
Fitting a disposal to an old cast iron drain in a West Ashley kitchen sometimes uncovers the real issue — a drain already narrowed with buildup that cannot cope with the extra load. If a new unit causes immediate backups, the drain is the problem rather than the disposal.
The thing disposals do not solve
They grind food, but they do nothing about cooking oil and fat. That still goes down warm and hardens further along the pipe. It is the most common reason a kitchen drain keeps blocking, disposal or not.