Terrible service from Vodacom

Vodacom called to renew my data account and promised to charge the same amount but receiving more data on my data number. But when I checked the amount was not the same. I tried to call them to reverse the contract same day, they didn’t but instead they sent me from one person to the next until they cut off my line. I went to the branch in Key West to report and at Key West they sent them an email 10 days ago and they sai they’ll call within 48hours. Today I went again and the problem is still not solved. What frustrates more is I took a phone contract with them hoping they’ll cancel the data contract before the new contract. I’m so much disappointed.