Search the forum for the topic of "delayed installation", read a few of the threads that come up. Fundamentally you wait on them, they will provide no accurate information, it could be done tomorrow, it could be done in many months. Then VM will try and evade their obligation to pay compensation under Ofcom's automatic compensation scheme rules.
The regulars of this forum have watched in wonder, horror and despair at how VM have mis-managed the pre-pull and related re-pull activity for the past few years. Nobody at VM can help you. Nobody at VM knows anything. Nobody at VM cares. Nobody at VM can cut through the North Korean style bureaucracy. The staff here will be able to offer an apology, raise a complaint, and maybe send an email on your behalf to the mythical "area field manager", who in turn is equally unable to help. Any complaint will be either completely ignored, or get you a poorly worded fob-off that takes you no further forward. One poor soul who came to this forum seeking hope waited an entire year for their installation to be completed, another waited 13 and a half months. Admittedly most installations aren't like that, but the process operates like a mystery box - no way of knowing what's going on.
You may also get the council delays excuse, both the (wrongly) justify VM's inactivity, and then to dodge the obligation to pay compensation at £5.25 per day for a delayed installation, plus £25 for any missed visit that you had to be in for.