No response to phone calls or emails

I have been a client of this service provider for almost 20 years. Now that I want to use their services, I was asked to mail them my updated contact details and appliance list. This was done on 27 Oct. No acknowledgement of my mail has been received to date. I have tried calling Dudu so many times with no success at all. I even left a message for the manager to call on 01 Nov. Trying to get anyone to answer the switchboard is another story.

I am appalled.