New internet issues

Hey folks, hopefully you can help. Today I've had new Internet installed. BTs Full Fibre 500. Got a few issues. First I'm only getting 250Mbps max on my PC and work phone. Second my phone is only getting 40-50mbps. It's an Oppo A54g. Anyway to speed up both? It's weird that the phone gets a download speed in the same range as it's upload speed when I run a speed test.

Any help would be appreciated.

Thanks guys.