Sage poor communication and service

Sage has had a message now for about 2 to 3 months of ongoing issues with their mail servers. Invoices issued do not reach intended recipients and Sage says: "sorry for the inconvenience"? How long does it take to fix this?! And there is no way to contact them to try and have this issue resolved. Meanwhile they are happy to charge full service fees, even though a integral part of their service is not working?