西班牙采购需求：视频对讲系统、WIFI视频门铃、音频对讲、无线门铃、智能安全摄像头、智能婴儿监视器

I'm reaching out because I'm experiencing an issue with my wireless doorbell that has a built-in camera from your brand. Recently, it stopped sending notifications to my mobile phone for incoming calls. This has been quite inconvenient, as I rely on it for added security and to stay connected with visitors. Could you please provide any troubleshooting steps or solutions to help resolve this issue? Additionally, if there are any compatible accessories or replacement parts that could improve its functionality, I'd be interested in learning more about those as well. I appreciate your assistance with this matter and look forward to your prompt response.