Video Streaming and Skype Calls Suddenly Impossibl...

After having used the service for quite some time and been able to do the not out of the ordinary activities of streaming youtube videos, BBC Iplayer & the like & make a Skype call I am now over a week into the problem of being unable to. Having spent countless hours on the phone to "support" and installing a new home hub my situation remains the same. I have now been told there is nothing more they can do, they won't send and Engineer & when I asked " so are you saying I just have to live with it & accept this is as good as my service is going to get?" the reply was "yes". Well.. thats customer service at its finest right there.
I run a wired connection & am tired of speed tests!! results returned vary from acceptable to downright appalling & it is clear the problem is intermittent.
I have had BT Infinity 2 for over 12 months and have had several issues during this time, always taken ages to sort and always eventually resulted in an Engineer having to come out.. Issues have generally been given the same reason to me & a quick fiddle with the lines at the exchange by the Engineer has fixed it. Of course getting BT to send an engineer in the fiirst place is nigh on impossible.
Any help or advice would be very much appreciated.. My next step is to contact billing and offer half payment for the remainder of my contract in lieu of the half service I receive (until it is rectified of course)

Thanks to both who have responded to me here thus far. Here are the results of my most recent speedtest in full.
1. Best Effort Test: -provides background information.
Download Speed
1.57 Mbps
0 Mbps
65.74 Mbps
Max Achievable Speed
Download speedachieved during the test was - 1.57 Mbps
For your connection, the acceptable range of speedsis 16 Mbps-65.74 Mbps .
Additional Information:
IP Profile for your line is - 65.74 Mbps
2. Upstream Test: -provides background information.
Upload Speed
0.01 Mbps
0 Mbps
20 Mbps
Max Achievable Speed
Upload speed achieved during the test was - 0.01Mbps
Additional Information:
Upstream Rate IP profile on your line is - 20 Mbps

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hls::Resize(mframe, mframe_resize);
hls::Resize(mframe_resize, mframe);

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Well I leave you to read more.
I hope this helps....

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