meant congested not connected

Make sure all the cable connections are tight to the wall and modem etc. if you are using cable internet. Also unplug your cable line and power from your modem for a couple minutes then plug them back in. you can just reboot your router or just unplug it the same time you unplug your modem. This resets your internet connection to your isp. Sometimes this will resolve internet problems. Also if there is an modem update released by your cable internet company it may initiate the update.

Another thing you can do is run a ping test on Gofile and ipconfig test. You can Google how to do each.  Ping test for your connection to Gofile. Ipconfig test for your network.
These tests are run in command prompt and very easy to do. Make sure you take a screen shot after each test or else save the results in notepad or whatever.

After the tests are running call your isp and tell them you are having download speed problems. tell them the tests you ran and give them the results. It may help them fix the problem or at least possibly diagnose it if its a hard-line problem somewhere between you and your isp.

Outside of peak hours in network connected areas download speeds are often better

I agree with everyone else's assessment. Gofile is very fast for a free download server. Its not quite as fast as when I download paid premium links but pretty close. I almost never get slow speeds on Gofile. And even the rare slow speeds are still fairly fast. Its definitely on your end.
Could be your setup or maybe your isp is capping your speeds. Try downloading outside of peak hours. If you live in a network congested are internet speeds are often capped. They get capped because businesses are prioritized and also the other purpose of capping is because more people are online so speeds are slowed so downloading doesn't kill someone else's network. Try a wired connection instead. A wired connection may help your speeds (less connection as opposed to wireless)
Also your speed issue could be from the way you are downloading the files. I also use IDM (Internet Download Manager) and always get the fastest possible download speed the download server websites allow. Download managers tend to be better than browser downloaders.