Bad customer service

I am utterly disgusted with the bad service I received from Vodacom at first I was sold a product and was told I could cancel it at anytime they acknowledged their mistake after putting them on Hellopeter they took the voucher back and promised to cancel the contract when I checked up to see if it is canceled I was told to pay n cancellation fee but they the once that’s at fault. I am a very loyal customer of Vodacom and I will ensure that I cancel my contracts with you as you don’t understand customer services at all