Unlikely you will get a call back. Here is where it can get sorted.
Post up a few photos of the damage so that a VM person can assess the situation when they get here in a couple of days - and wil respond on here.
Re the issue... are you a VM customer yourself, or has a previous occupant had a VM install?
If so there is likely a "wayleave" in place that grants them access to your property - whether doing what they have done is covered by that is for others to comment
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John
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I do not work for VM. My services: HD TV on VIP (+ Sky Sports & Movies & BT sport), x3 V6 boxes (1 wired, 1 WiFi, 1 on PA) Hub5 in modem mode with Apple Airport Extreme Router +2 Airport Express's. On 250Mbps, Talk Anytime Phone, x2 Mobile SIM only iPhones.