with regards criminal damage of Virgins property many years ago I had a dispute with NTL (now Virgin) which ended with me cancelling contract and OFCOM getting involved. In the end I won compensation, but whilst this was all going on I got a little angry about the situation, the red letters threatening bailiffs (I owed nothing as the service was never connected due to various issues), and the damage to brickwork on my property casued during a botched install.
I sold their digital box on ebay (to cover repair costs to my property), when their agent (big thuggish looking man who just grunted 'NTL box' at my wife) called we told him the situation he shugged said 'not another one' and left. They never chased me for returning the box again
I also dug the cable up from the garden (this was needed anyway as we where laying a new driveway and it was not buried deep enough with no slack on it to bury deeper), cut it at the boundary with the road and posted it back to them with a note explaining why and that I had no option as if it stayed on my propeerty I would have to charge them 'rent'
They never pursued me for criminal damage or theft, in fact I actually got a nice apologising letter when OFCOM decided in my favour
So I say give them 2 weeks maximum, then rip it up and get solicitors involved to recover costs of repairs etc
Involve OFCOMM (or whatever they are called now) it takes time but in my experience they resolve things
