From your router stats you are still on adslmax nor infinity hence why speed is the same as before
Yes there have been other posts similar which get sorted out eventually sometimes with mod help
Let's see If mods can help and at least find out why delay. They will post here
The mods will post here tomorrow and offer to help which I suggest you accept. The dslchecker showed you can get fibre with a match faster connection than adslmax. Mods will inverstigate and help if fibre available
so check back tomorrow and ignore helpdesk
Of course - although I am totally baffled, any help is welcome with this. You've been great so thanks.
The dslchecker results less than 14 days ago showed FTTC available but could have changed.
@widders Can you run the dslchecker again and see if FTTC still available