Vitality broadband

Vitality broadband gave me notice during December 2018 that they will migrate my internet service to MWEB from February 2019. No further info was given. I have send at least 6 emails to Vitality Broadband since Thursday 17 January, but got no response. I want to enquire how this migration will work. My internet connection is also off since Thursday 17 January. I send emails via the Zimbra portal from someone else's computer, because my internet at home is off. No response from them and their phones are not answered either.