Mweb email migration is a customer nightmare

Mweb have migrated mail boxes, which is not a bad thing. Except if you have an error of failure. The call centre is completely unresponsive. After several long phone calls waiting to become number one!!! the call is dropped. Any email offered under the migration messages on the IVR don do not respond, merely giving a automated message with a reference number and 24 business hours to respond. i have critical email to get out to help resolve a billing dispute and are unable to do so