If you've restarted the hub, and you see post-RS error counts notably rising in the following 12-72 hours, then there's a cable fault that has nothing to do with wifi. Sounds to me as though the field technician thinks you need a cable re-pull, but requests for those are handled with the speed and professionalism for which VM are world famous.
Are the post-RS errors rising? How long has this been going on? How many attempts to get VM to fix it have been made?