I played World of Warcraft since the game came out, @ $15 a month. During the earlier years, when the game was getting big, they had server issues, too much traffic, etc. I'd go a week and only be able to actually connect to the game once.
Some friends contacted the authorities about spending $15 for a month to play and only able to do so 20% of the time. They were told they have only 2 options, as I'm sure is the case here. Those options were to choose not to do business with them, or to accept the problems and try to make the best of them.
Of course, as is always the case in this country of ours, you could choose to sue. That I'm sure would work out well. I'm sure WGT could get hundreds of people to testify that they have no problems playing the game, the suit would get tossed out, and you'd probably get your butt chewed out by the judge for wasting the court's time with frivolous lawsuits, but hey... whatever floats your boat.
As far as the 'faulty' equipment, given that you have the option to rent before you buy, to find out if the equipment meets your needs, I'd say it's buyer beware.