You can try calling the status line 0800 5610061, this often lists localised problems down to street level.
But... if it's been over two weeks, I would guess that either only your equipment is affected, or it's only affecting a couple of other customers and they've not reported it either.
As per micky's comments.... VM Forum staff work their way through posts on here, but it can take anything from a few days to a week. So I'd recommend calling faults - 150 from a VM landline, or 0345 4541111 from any other phone.
The automated system may attempt some fixes, and you then need to redial 10 or so minutes later when those fixes fail.
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