The quick start is offered if VM records show a recent past connection at the property.
Sometimes the connection may not be via a wall box. Sometimes just a trailing coaxial lead is where the hub connects to. Unfortunately, previous occupiers often cut these and remove them as well as the boxes if they don't actually use VM.
If you have your own VM connection to the property, the usual advice is to find the 'omnibox' outside where the VM cable comes in from the street (usually grey or brown plastic wall box which may be badged with VM or one of the previous cable TV company names) then see if you can trace the coax cable from there into the property (may well be hidden behind or inside fittings, furniture etc.).
If there really is no cable coming in, then you need a technician installation.