Distgusting service

I've had a horrible experience from vodacom I loaded airtime to buy Dat for their goal to get 100 Vodabucks on Wednesday morning, I did not recievie my Vodabucks, I waited 72 hours and phoned them on Friday evening and they put me through to vodabucks and I was toold I would get my Vodabucks In 24 hours till now I haven't received them, when I call them they have blocked my number saying they received to many calls from it and gave me a number to phone and use my airtime and now I have run out of airtime and cannot get help. It is horrifying I don't know why I am still using their network it's disgusting