phone is stuck on samsung logo and is continuously vibrating

Hey guys i need your help, i had left my samsung galaxy j7 prime on ultra power saving mode untill it got to 0% and then i had to pay for something using wechat and it started glitching and then it turned off. So i went back home , put it in the charger and turned it on and it went smoothly till it reached the samsung logo, it kept on doing that dim to bright thing while vibrating a few seconds apart. i tried putting it in recovery mode but it wont fully power off because it has a non removable battery.