Vodacom is ****

So In January I upgraded 1 of my Vodacom lines, It took Vodacom 4 Months to deliver my simcard. Then I was promised to get 10 gigs free for the next 12 months, however they only sent me 10mbs. it is now July already and I have spoken too so many agents and spent hours on calls, everytime I call back I am told that the previous call or queries was never logged. Now on Friday I finally cancelled 3 of my lines and then I get alot of calls. I subscribed to showmax via Vodacom now all of a sudden they cant cancel that subscription, but I also cant log in because it tells me to subscribe. Vodacom offers the worst customer service ever, I really don't know what to do anymore.