remote device

Yes, you can purchase a replacement remote from Apple or an authorized reseller. It will depend on which model you have in terms of compatibility, refer to the link above. You may also want to check the battery and troubleshoot prior to replacement.

How to replace the battery in your Apple Remote - Apple Support (CA)

Charge the Siri Remote - Apple Support

If your Apple TV remote isn't working - Apple Support (CA)

Please Identify your Apple TV model - Apple Support and then we can point you to where to get a replacement. I would start by using Amazon.

It is unclear what your issue is. Please rephrase so someone can better assist you