[Skie]

You are on an old modem, so you'll need a DOCSIS 3 capable device. Which means the venerable Superhub.

Go to your account area on the VM website, in the green box at the top it should have a more info link, click that and you might be told you need a new modem and you can request one there. Otherwise it's a call to 150 and they may even try to stick you with a new 12 month contract just to be lumbered with a worthless lump of plastic, which you can probably avoid by calling retentions instead (150, choose thinking of leaving).