I'm just wondering why my Telecom internet is so slow at the moment, basically.
Over the past couple of year or so, my internet speeds have been progressively getting lower and lower. Once upon a time, we were able to comfortably watch a HD Youtube video, and not have to stop and wait for it to buffer at all. Now, however, we can barely watch a vid on the lowest quality without stopping it and waiting for it to load. This is just an example, all internet activity has slowed down. Now I can't even hold a Skype voice call, it just cuts out (the same with other voice and video call programs, like Google Hangout).
Another thing I have noticed is that it is especially slow at night, where I might get 1.5mb/s max during the day, I am lucky to get 1 after about 6pm.
31st October, cable:

6th November, wi-fi:

24th November, wi-fi:

All of my results: https://www.speedtest.net/results.php?sh=caa31bee4b8e728b63a24c59ab9bcde4&ria=0
I'm sorry I don't have results from earlier in the year, but they seem to have disappeared :/
We live in a semi-rural area, about 30km out of Hamilton. I do use a wireless router, but I know for a fact that this is not the reason for the slowness. When I connect my laptop via cable I get only a ~0.10mb increase in speed. I have also tried with a non-wireless router/modem, and also on a different computer (desktop) none of which have improved the speed even slightly. I have changed operating systems, computers, DNSs, routers, cables, everything I can think of, and yet nothing I do gets me even close to what would be a decent speed, even above 2mb/s. Oh, and we are not over the 30gb data cap, we usually only use about half of that.
If anyone has any ideas on how to make my internet faster, if there is anything I can do, please post them! Or could it be a fault in the area's wiring (or my house)? We will have quite old wiring, as our Broadband was installed about 7 years ago, possibly longer. I have contacted Telecom about it, and they have said we should be getting about 16mb/s. They then sent us a free wi-fi router to see if that would help fix the problem, but it did nothing and we haven't heard from them since.