Frustrated

Cell C sales consultants has been calling me non-stop this past week from 30 September. They would cut the call immediately after I answer it. This harassment has been untenable because I've been rather busy this past week. It seems that they need to make a certain target amount of calls in a day and so they call and cut calls. When I called them to make them aware I was told to make a complaint using the email address ***. This email address is not functional. More time wasted.