Broadband Speed Issues

[Scooby.doo.1973]

My Broadband speed and phone line dropped out 2 days ago, Sky detected a fault outside the premises and escalated to Openreach, who attended and advised he found an issue with the connection and replaced it. He then shared stats with me that showed I had 80mbs to the property.

My Broadband was still very slow, speed tests showed 4mbs, I powered down the Modem for 5 mins and rebooted, but this reduced it further to 2mbs.

I called Sky who advised me there was no issue as they could see the hub receiving 80mbs, I suggested the Modem was at fault, the tech guy got me to perform a reset, by pushing the button on the back, and this increased it to 4mbs again. He recognised by concerne, but advised he couldn't send a Sky technician as all the diagnostics tools he used showed positive results, he cannot see the speedtest I can and has no way to confirm the current poor performance.

I am at a loss what to do next, can anyone assist further and help me please?
I have performed speedtets on multiple devices, all retern the same despite what the stats are showing. I just want a good broadband speed.

TIA, Scooby.doo

My router stats are below;

[GD1]

@Scooby.doo.1973  It appears that you use wifi exclusively and no ethernet connected devices, running speed tests over wifi means you are using the slowest point of the network.   Can you do a speed test from an ethenet connected device?

You router stats show your getting full speeds your line can support.

[Scooby.doo.1973]

Thanks for assisting @GD1,

I connected my Laptop direct to the Modemand did a speedtets and get a good result...

The previous speedtest was from my mobile, standing next to the modem on Wifi.

Does this mean you supsect there is a wifi issue with the modem?

Thanks for helping, scooby.doo.

[GD1]

@Scooby.doo.1973  Typically wifi signals can get interference from neighbouring properties especially if they are fighting to use the same channels, try the steps here to see if you can improve the speeds.  https://www.sky.com/help/home/broadband/my-broadband-speed/improving-wi-fi-signal-to-my-devices/arti...

[Scooby.doo.1973]

It seem that this issue miraculously resolved itself? I was told that they couldn't send an Sky engineer to investigate and test my equipment as Openreach enginerr that fixed the line fault hadn't cleared the job doen his end, and thus there was a pending case, he advised me to call back the next day.

Overnight the Router seems to have sorted itself out and I now have a stable Wifi and speed.of about 50mps, although as I just tested I have quicte a few other devices online, so to me this is acceptable. 

No further reboots were needed, and it just re-coveered the speed.