I've been with Plusnet for a while now and using the standard router. We have a FTTC connection and the box is only about 700m away. In the last few days I've noticed that I am now unable to UPLOAD any files over my connection.
I get good tone on my phone over the extension but I've still tried connecting the router direct to the BT master socket. I've tried various devices over wifi and powerline and even cat5 but still no luck. Even over the wifi in the pub down the road (only to try to troubleshoot my connection issues at home of course ) I was able to upload picture files to One Drive over their wifi.
Even the TBB speed test stops working once it gets to step 3.
I just want to see if there is anything else I can try before I embark on the CS journey.