It was a business provider called Unicom. Prices weren’t the best but the broadband was. Paid for 330mbps and got around 300/310. I was using their provided box at first then switched to my own and they both worked great.It was a technicolour router then a TP LINK router
Is it a TP-link you are using now? They are normally pretty good, but there are a few cheaper ones have lower spec Wi-Fi, so if you can post what model you have, that would be of use
As others have said, Wi-Fi is not great for doing speed tests, so many different versions in different devices and also many things can affect Wi-fi, need to use Ethernet.
I have a TP-link router, if I use my Mac on Wi-Fi, I can get around 480Mb/s, but if I use my phone in the same place I may get 100Mb/s if I am lucky.
Adrian
Desktop machines Mac mini pro with macOS Ventura, also pc Ryzen powered with windows something or other.
Zooming with Zzoomm FTTP,