Vodacom Service

I have 2 data contracts with Vodacom.Since around February we are batling with slow or no internet connection.The so called customer care centre were contacted on 2 occasions,promising to send me a reference number.After no reply 3 e-mails were send to Vodacom,again no re-action while they promise on their website to reply within 24 hours.I then went to Vodacom in the Grove Centre in Mombela explaining my problem with the internet reception.A young man named Ruan promised me to investigate and will contact me that same day.3 Weeks later no comeback from them.This saga is going on for a couple of months now and still no reply from Vodacom.It is like fighting a faceless monster and I am frustated with paying for a service which is slow and not available most of the day .Even tried to use it between 12h00 to 06h00 .Still not acceptable .One of their rivals wifi reception was not good in our area to at Vygeboom dam .Went to see them and my contract was cancelled immediately.It feels that Vodacom is robbing me by not addressing my problem as a pensoiner