Help. Problems but no one to assist me

I'm unhappy that I can't get hold of someone to help me I had c fibre installed the sales person that sold me the contract was very good up to the point I signed and had the fibre installed I asked him to help me with the set up of the black box and followed up on it a few times but its 3 moths down the line now and he still has not fined the time to come do it. I do understand he probably already resieved commission on signing me up so he rather focus on the customers he is still signing up but part of the deal was him setting the black box up unless I understood wrong. I also went to and got my son a media pad from cell c and this month I feel I was way over charged but I can't get to someone to explain cause on the customer care line you need to type your phone number in to continue but c fibre and media pad does not have a number as far as I know my account number is ********** 189