My iPhone 5c won't turn on, and I've held down the home and power button for 10-15 seconds but it hasn't worked

Greetings eva675,

It seems your iPhone will not power on. That does sound troublesome. The following article provides troubleshooting steps which may help you find a solution:

If your iPhone, iPad, or iPod touch doesn't respond or doesn't turn on - Apple Support

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Best,

Bobby_D

Try plugging it in to the power supply and see if it powers on them. If the battery has run down, you may need to let it sit for a little while before it powers up.