(I made a lengthy post on this last night and today it's gone!!!!???)
Try to use Ethernet connection - you say you have laptop, take it to where the Router is located and use a minimum Cat6 Cable to connect it directly
If you must use WiFi, then ensure that you are at least in same room as the router - 5G gives excellent speed but can be compromised by walls between your device and router.
Be sure you are connecting to a local server for your speedtest - some apps or websites may use a server that is located far from you; I use Ookla Speedtest - that will use the location with the shortest ping and additionally you can confiigure to select from a lost of other local servers; apps are available from Ookla for direct install for Windows, Android, Mac and IOS
Be sure that nothing else is connected and hogging bandwidth at same time as you are doing your speed test - if another device is streaming 4K movie for example! Even other devices like security camera, doorbell monitor etc
How is your router connected to your incoming co-ax? Direct connection or via splitters (for TV boxes). How many splits are in line? For purpose of test, try to elminate any splitters on your co-ax line and connect directly to your router.
If all that still yields same result, contact your provider to come out and test your line.
