Moving my modem

[wireless]

I need to move my modem to a more central location in my home because neither my pc nor my Xbox are able to connect to the network and our phones barely have any WiFi signal in our living room. I tried just moving the modem and plugging into the most central jack but it looks like there is a pots splitter(I think that's what it's called) and when I pulled the jack out of the wall to investigate it turns out it's completely disconnected. Do I really have to schedule a service call for this? I'm new to Telus and I'm really not pleased. It's 2018. I shouldn't have to schedule a house call to move a modem.

More... (https://forum.telus.com/t5/Internet-TV-Home-Phone/Moving-my-modem/m-p/89422#M18184)