Lost 30% speed on renewing contract

[#1]

Renewed exactly the same service (unlimited fibre) and immediately lost 30% of my DL/ul speed despite asking specifically not for this to occur. Was getting 65-75 consistently for years and within 1 hour of renewing contract dropped to 50 max. I saw this on the document prior to agreeing contract,asked specifically why was I going to lose so much speed and was assured this was just a clerical issue and my speed would stay the same.
This was a lie.

[#2]

@GJMKFIBRE This sounds like a pure coincidence - renewals of the same product do not involve any tinkering with your account/connection.

[#3]

Then why have my speeds dropped to exactly the minimum stated in new contract on the exact day of renewing despite staying stable at the previous speeds for years?
Also this was several months ago so I have waited for any profile adjustments stabilisation but it never returns back to the 75 consistent speed I was getting for years

[#4]

I don't know the answer to that - sorry. If it happened 'several months ago', why did you not question it at the time?

For Community members to be able to help, information from these two sites, as screenshots, posted as pictures within the topic, not as attachments:-

BT Broadband(obscuring your phone number) and BTW Performance Tester - Over a wired (Ethernet) connection if at all possible, please report the 'ADDITIONAL DIAGNOSTICS', and sight of the broadband connection status from your Hub (with the 'Username' obscured) would be a good starting point.

For the Hub One -

Navigate from the Home Screen to Troubleshooting > Helpdesk

For the Hub Two -

Navigate from the Home Screen to Advanced Settings > Technical Log > Information

It may also be a good idea to report the results of a Quiet Line Test - dial 17070 option 2 from a (preferably corded) phone. After the confirmation of your phone number, there should be total silence apart from the regular 'Quiet Line Test' announcement. Any other noise - report a PHONE fault first.

If you are unsure about any of the above, please just ask - I am happy to help.

[#5]

I did question it at the time
I questioned it BEFORE renewing
I was assured my speeds would not change
This was not true, they dropped to the speeds I questioned on the new contract

[#6]

OK - but it may still be useful to supply the information I requested above.