Google Play service is missing after rebooting Vivo y91

My Vivo y91 phone got rebooted because it won't open. After it finally booted up, a very cautious notification showed up that >Google Play Store won't run without Google Play service, which are missing from your device. I was shocked, so I opened up my Settings, and then the App Manager. There, the Google Play service was gone. So, I hurried up and contacted the vivo team so they could help, but it was going to take a long time. So I've searched on how to get it back, but it seems I can't find any answers, so I had to wait for the email to get delivered. How to get it back?