e-mail service cut off

I am in the process of switching service from Telkom to Mweb, due to the many problems encountered with Telkom. I phoned the call centre to cancel the data service. It appeared afterwards that the e-mail service was also cancelled/disconnected. Now I am trying, in vain so far, to get the e-mail service running again. No luck so far. Every call to the call centre takes a very long time and the people are clueless.