WiFi is not working correctly

[Cat801]

We had fibre 100 fitted initially in October, had loads of issues had an engineer out and still didn't get resolved. 
spoke to someone who said it's our fault as we've got 2 PlayStations and 2 fire sticks so it's eating up all the WiFi even though they weren't used at same time, told to monitor which we did and still awful service. 
dpike to someone else who stated 100 isn't enough for what we need so upgraded to 300 and new router, which still hasn't resolved the issue I'm paying for a service which we aren't receiving. 

[Chrisee]

@Cat801 the "too many devices" excuse is based on fact but in practice is often not the problem. However to advise forum members will need more information. As a start can you run thr service checker in the My Sky app and note tgecspeed Sky report to your hub. Then go into the Netflix app on each firestick and run the network test in the Get Help menu which will tell you thecstatus speed at the Firestick. Ideally run a speed test on other devices around your home the onecat Fast.com is reliable.

If you post those it should be possible to see if the issue is with your connection or as is more likely flaky WiFi in your home.