I'd be surprised if the forum staff get involved now. It's company policy once a deadlock has been issued to not comment further.
I think the OfCom policy of paying recompense for delays is voluntary participation by ISP's.
For dispute resolution, from what you said, VM have not communicated clearly how they got to those sums and reasons why the full amount is not being paid, and that is defined by OfCom as mandatory requirement.
See Ofcom rules here:
https://www.ofcom.org.uk/phones-and-broadband/service-quality/automatic-compensation-need-know
Problem | As a landline or broadband customer, you would be entitled to compensation if… | Amount of compensation |
---|
Delayed repair following loss of service | Your service has stopped working and it is not fully fixed after two full working days. | £9.98 for each calendar day that the service is not repaired |
Missed appointments | An engineer does not turn up for a scheduled appointment, or it is cancelled with less than 24 hours’ notice. | £31.19 per missed appointment |
Delays with the start of a new service | Your provider promises to start a new service on a particular date, but fails to do so. | £6.24 for each calendar day of delay, including the missed start date. |
Where signatories do claim an exception to paying automatic compensation, we expect them to clearly communicate the reasons why to their customers, and continue to act in their customers' best interests. In addition, where signatories are not paying automatic compensation for legitimate reasons and customers are without service, customers should not be charged for a service they are not receiving.