Telkom medical practice email not working (because Telkom closed the mailbox)

I have a medical practice for which we have/had 2 email addresses (with separate mailboxes). One email was my personal email, and the other the practice email. Telkom has without warning or explanation closed the practice mail box. This has caused my practice email to stop working. The practice email is essential for our proper functioning, its not just an inconvenience. This has been a problem since 4 December. We have tried fruitlessly every avenue possible to rectify the matter. Hours have been spent every day on the phone with the Telkom technical support, and Telkom technicians have come to try and sort the problem out without any success. In the meantime we have no access to the emails that are sitting in the closed mailbox. These emails are vital to reconcile the medical aid payments, and there are also important medical reports. We have also been unable to send off prescriptions for our patients, which will impact on them receiving their vital chronic medication on time. This is totally unacceptable service and I'm totally frustrated because no one seems to be able to sort out the problem.... which was created totally by Telkom itself!