Wi-Fi failing after change from copper to fibre

[Gordon+MCM]

Changed from copper to fibre recently, but the modem stayed in exactly the same position. 
I now find that the Wi-Fi strength deteoriates and my MacBook in my study cannot connect to the hub.  Nothing else has changed and I wish I had never changed to fibre. 
I feel the hub, model SR203 is faulty and want a replacement or upgrade asap. 

[Addie15]

Hi there, 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.

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 

[Addie15]

Update-We are closing this session now due to no further response within 48 hours. If you still need help, please let us know so we can re-escalate this for you. Thanks.