Keyboard not found... trackpad also not working

I have macbook pro 13 inch retina 2015 model, running on OSX Mojave.

Today morning when i turn on my mac it was showing no keyboard found, searching for Bluetooth keyboard. Trackpad was also not working. Then I searched on internet tried SMC reset. Nothing happened. I did shift+command+option+power multiple times to turn off i start again and after some tried keyboard and trackpad started working. I used it for sometime and suddenly they stopped working and still in that state. I tried above solution but this time not working. What should I do??