WiFi not working on all devices

[JJC1]

We just had our full fibre 300mbps installed in the last couple of weeks and are already having serious issues. While the Wifi seems to work fine on my work laptop, it isn't working at all on my partner's laptop (connected but no internet), and is incredibly slow on my personal laptop. I've also had a number of hours-long dropoffs on my mobile. My partner has been through a whole process with her work's IT department and it definitely isn't an issue on their side. We've also done all the usual troubleshooting stuff. The service checker has repeatedly found the speed to be nearly perfect and no issues with connectivity. At our wit's end trying to work out what could be wrong with it. 

[-Heather-]

Hi @JJC1, I’ve escalated your post to our Community Messaging team who will invite you to a private chat shortly and help you with this. 

Just look out for the colourful bubble to start the conversation. Please be aware conversations automatically close if there is no response within 48 hours.

Here's more information on how Community Messaging works - https://helpforum.sky.com/t5/Did-you-know/Escalating-a-post-to-a-Sky-expert/ba-p/3711147#M141