Britelink is unreachable

I am not even officially a client yet, and already I am not happy, I signed up for a Fibre Internet Subscription on Monday and I have already received the device, However, for some reason, they have 1 digit wrong on my Cellphone number on my application, I keep on calling Britelink, however, you cannot speak to a person and I have left 4 messages already, explaining my situation, NOBODY CALL ME BACK, I have also called Vuma that assured me that they have corrected my cellphone number with Britelink, yet, I just received another mail, saying a Maintenance call has failed.

This is not on and now I have to spend an entire weekend without connection, simply because nobody can rectify a digit on my contract.