This thread is entitled in the first part "Mis Sold".
I am in a similar situation, having been told yesterday that the only speed that the Engineers would guarantee for my line is 33mb; and then to be told 40mb is excellent for your line, with the inference that I should be delighted.
My disgust at this is therefore increased to fury when I look on the "products and services.bt.com/products/manage/" page and find that for my telephone number I am told .......
"It looks like you’ve already got BT Infinity, but you can still upgrade your speed or usage limit" then followed by this: You currently get 54Mb-73Mb Estimated download speed range
can you enter your phone number and post results remember to delete number https://www.btwholesale.com/includes/adsl/main.html
It may be inviting to suddenly claim mis-selling is the problem but until things have been looked at then who knows?
Answer whatever you are asked as you may find it is a fault which can be resolved.
Can you post your helpdesk data from the HH5 please? These are in Troubleshooting/Helpdesk on the web interface at http://192.168.1.254 or http://bthomehub.home
Please miss out any data you don't want to post
Can you post your IP Profile by running the BT Performance test at www.speedtest.btwholesale.com please? When the first test has finished, press the Further Diagnostics button then after you enter your phone number, your IP Profile should be displayed.
I'm in the same position, take a look at this http://www.asa.org.uk/Rulings/Adjudications/2014/5/British-Telecommunications-plc/SHP_ADJ_257752.asp...
I've had a reasonable result using it as a stick to beat BT with, the only good advice I've had from this forum is to use the Openreach modem for a stable connection. Good luck OP.