Not answering telephone!!

I recently signed a new contract with MTN, at the Brooklyn Square branch. After 2 days (the lady said approval will take 24 hours) I started phoning the branch, but there was no answer...That continued for another 3 days! I phoned more than once every hour, sometimes up to 5 times in succession. I cannot believe a telecommunication company does not answer the phone. The general MTN callcentre is just as useless, I hung up after 10 minutes of holding on. I eventually had to go to the Brooklyn Square branch (this was after 5 days) and they told me the reason they don't answer the phone is that the phone is in an office at the back and they are understaffed! How difficult is it to get a MOBILE phone for a branch of a MOBILE phone company? Then I was told the number port will take another 12 to 24 hours. After 72 hours I eventually had signal on the cellphone with my new MTN SIM, but couldn't phone or SMS.... I started phoning the branch (using another phone) again, but still no answer... Eventually I had to go back to Brooklyn Square branch and it seems they forgot to RICA the SIM, so it was sorted within a couple of minutes (after waiting about 20 minutes...). Extremely frustrating!