recently just installed 300Mbps fibre internet.
TM contractor came afternoon and due to time concern, he pulled the cable from pole and install the modem&router at 2nd floor (double storey house)
also the reason pulling the cable to 2nd floor is because less cost & faster installation.

but the thing is, most of the my devices like TV Box, CCTV, smart home all downstairs living room. I watch TV box sometime wifi not stable and laggy I prefer plug in LAN cable. Plus my CCTV (going to install in future) also need LAN cable to connect

so how do I improve this?
should I ask wireman come pull a fibre optic cable over the celling so I can install the router at living room?
or use mesh wifi or anything

thanks