I'm sorry about the issue. When did this issue first occur?
What's the model of your internet modem / router device?
Can you please press and hold (or slide & hold) the power on / off button / switch on the kindle for about 45 seconds, then turn it back on. Then go to the Wi-Fi / Wireless option on your kindle, then let me know what it shows there.
Please reply at the box below. Thank you,
Please type at the box below, then click on the Send button below to communicate with me, so I can help. Thank you,