In the past couple of weeks, my internet connection have been very slow to the point that I cannot watch Youtube videos or any other video players without having to wait for it to buffer. Mooreover, it takes a couple of seconds to load most websites I go to. My most recent speed test shows this:
0.56 Mbps download
0.13 Mbps upload
I used to have double the speed which is closer to my service promise speed of 1.1 Mbps+
What can be done to restore my previous internet connection speed?