Your query here in 'Tech Chatter' may not get VM forum team attention. Someone might kindly move it for you to a better forum which the forum team do read.
Would imagine VM could/would/should send someone to fit a similar cover on the wall for you. Don't think the cable is in too much imminent danger though. It is pretty tough stuff.
The wall cover seems to be referred to online as an "elephant's foot" or "BT Connector Bend No.1". Past topics on the VM forums seem to refer to it as a "dolly".