When Cable Companies Break -Your- Cable Modem?

Steve asks: "I've suffered ongoing problems with my cable access for several months which my cable company has not resolved. Yesterday I discovered that the cause of the problem was probably due to a remote software update applied to my cable modem by the cable company 2 months ago. Their solution is to give me a new rental modem. This is fine, except that I *own* the current modem which is now broken and can not be sold on. The cable company are unwilling to offer compensation. According to my contract, the company can only modify equipment which they own. The question: have they broken the UK's Computer Misuse Act? Should they be liable for damages caused?"