[Mr. Maggot]

@Ray- Usually everyone's ping decreases at night. But maybe you have one of those plans where you get a different speed's at different. Have you taken speed tests at those times?

@Dark- They are not cheating you. :lol:
After you told me the amount you pay, I am sure that your internet is not unlimited. It probably has a limit of 5GB or so. Hence after the first week you crossed your limit and they "adjusted" your speed.