Do these stats look ok.
My tp link says 34998 and 6.6 up and on ADSL checker it's this
you need to post more information about your connection so stats from tplink
have you been having problems with router dropping connection?
any noise on quiet line test?
I suspect your tinkering about with routers has incurred the wrath of DLM.
https://community.bt.com/t5/Home-setup-Wi-Fi-network/Adding-gaming-router/td-p/2159427
How about you posting some connection stats then rather than a screenshot of an estimate and a download speed reported by your router.
To ask about line stats and not show them does not beg an answer. Once you post them then someone will be able to advise.
What about quiet line test?
The stats are very brief - what about internet connection time not system uptime
Looks like the DLM system has put you on a banded profile in response to errors on your line, at the top of the up to 35 Meg band of these VDSL Banded Profiles . The QLT is a must.