Past topics on this kind of subject on here usually describe a very slow tortuous process with the customer going backwards and forwards with VM, often with no progress or no resolution.
You should consider what kind of a fix you are seeking. The person VM sends out to do any more repairs may have no more skill/ability than the person who splodged some silicone in the hole and stuck a plastic cover plate on top.
AFAIK the third-party arbitration process has not covered property damage in the past but you should check with
https://www.ombudsman-services.org/
to find out if that is so.
You could also consider getting it fixed yourself and reclaiming the money from VM via a small claims process against VM. You should seek advice from Citizens Advice on the best way to proceed with that.
https://www.citizensadvice.org.uk/law-and-courts/legal-system/small-claims/
