Incredibly slow download speeds in pacman/pamac

I have a 100 Mbps internet connection (the speed I get through PLC is about 85-90 Mbps download and 10-10.5 Mbps upload) however every time I try updating my apps through pacman or installing a new app via pacman or pamac I get hardly 500KiB download. Even after updating mirrors via

sudo pacman-mirrors --fasttrack && sudo pacman -Syu

I still get the same download speeds. Has anyone else experienced this and know a fix?

You must setup the mirrorlist manually.
Choose mirrors from the country, where you live.
From the list:

Just did sudo pacman-mirrors --country Greece && pacman -Syuu and still the same

Can you check your internet connection with a speed test side ?
Go to Goooogle and use the term internet speed test.

My speed test is always above 85 Mbps down and 9 Mbps up so that isn’t the problem. I just logged back into Manjaro after being out of town for 2 weeks and downloads are back to normal without me doing anything…

Then you should check the mirrorlist of pacman.