Rude customer service
I got in touch with VM to setup a new broadband. I checked online on Openreach website, that the postcode still doesn't have any Full Fibre cable and is still on the old Copper cable. Hence all broad...
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And in addition to all those reasons, every VM local street cabinet has a finite number of connections. If it's an old system it's quite likely that every connection has been taken up and there is no capacity for any more.
"If VM says that they have their own network, they should be able to help me out I believe."
Unfortunately what you believe and the reality are different, retrofitting any type of cable or fibre into flats above ground level requires a lot of work and permissions.
With the copper line cease not far over the horizon something will need to be done but you can't force VM to step in.