Just had the internet installed this week and tested my connection via wifi and am getting low speeds
When testing on my mobile phone that I lean right up against the modem I get 30 Mbps.
I unplugged the modem to reset it and tested once more and get the same results.
Welcome to the community!
You can not do a speed test via WiFi you need to do it through the ethernet cable and you will get more accurate results. The WiFi can not be used because lots of things can interfere with the signal like other electronics, microwave your neighbour's WiFi can all create noise and distort the WiFi signal.