High Ping and latency issues Hub5

Hello,

I am currently on the 1GB Wi-Fi service from Virgin Media and have been experiencing some issues. During gaming, I receive random lag spikes sometimes reaching over 1000ms. The lag spikes last around 2-3 seconds but make it hard to play games. 

To quickly summarise:

- This lag is not limited to one device and happens across different devices. 

- I receive good speeds (around 700 down and 80 up) and I am not far from the hub 5.

- This happens across multiple games too not just a single game.

- An engineer has come out and replaced the entire wiring as well as installed a brand new hub 5 but the issue still remains.

- There is no immediate electrical device near the hub or anything blocking how it works. My Hub 3 was in the exact same position and I never experienced random lag spikes on the lower speed which is weird.

- Virgin Media are telling me they can't find any issues with the hub. There is no set time I receive the lag spikes and it happens throughout the day.

I set up the think broadband service to track my wifi and this is the latest graph: (I am not sure if its normal or not)

Can anyone help me out? I have tried using wifi 6 as well as wifi 5 and made no difference. I cannot use wired as my computer is upstairs and on 1GB wifi I shouldn't need to.

Thank you,

Tanju