Got a callback from CHT today. Repair time for the cable might start today or might not and could be finished by the end of May or else the 22nd or else it's not clear at this time. In the meantime with CHT have been reallocating capacity from somewhere so now there is no problem accessing overseas websites. You are not having any problem accessing Netflix, Youtube, Facebook or even using BT. If you think you are having problems it's in your imagination as there is no problem now.
Should you continue to think you are having problems you should connect to port 2 of your router (!?) and all will be good. If you still think you are having problems then you should set your PPOE username and password in your router, if it's already set in your router then you should remove it and set it in your computer. Your imaginary problems will all go away then.
In case you are still having difficulty with this you need to take a day off work and wait for a CHT engineer to call around and tell you there is no problem. He will demonstrate there is no problem by doing a speed test to the closest CHT server he can find.
Hinet state that no customers have been complaining therefore there is no problem. As the service is still usable they will not be offering any compensation, so suck it up, bend over and take it.
Seriously though, if you haven't called up and complained then do so, even if only for the entertainment value. I believe after 8pm they use a third party translation service which can be entertaining in it's own right if you understand Chinese and feel the difficulty the translator has in trying to explain something completely illogical to you when they know themselves it makes no logical sense in any language. 0800 080 128, call and enjoy!