Hi Graeme_M84,
Thanks for your post and welcome to the forums. It's great having you on board with us in the Community.
I'm sorry to hear that you were having an issue rescheduling the engineer visit. You can usually do this through My VM here but you do need to ensure you are signing in using the Primary Account Holders details.
As it stands it doesn't look as though the appointment has been rescheduled so we are happy to look at this for you although we will need to run through some information with you first.
I have sent you a private message regarding this and will investigate further once I receive your reply. Just click on the little plum envelope at the top right hand side of the page to access your inbox.
Thanks,