Hi, top cover of external box is missing. Who do I contact to get repaired before water gets in ?

The VM forum team should be able to arrange this for you. They normally reply here within a few days.

Posting a photo on here of what is damaged and needs renewing may help them to refer the task onwards for repair.

Hi Pjhm 

Thanks for posting and welcome to the community.

I'll send you a PM now to assist further.