Cannot get in touch with Vodacom to cancel contract

Hi Team

I have tried on several occasions, exhausting 300 International minutes to get in contact with Vodacom to give notice to cancel my contract, which expires at the end of Feb 2018. I am currently in Australia and had to stay up in order to get the time difference right and then had to just wait on line or have the call dropped several times. In total, I have spent 300 minutes waiting to get in touch and still no luck.

I don't understand why this request cannot be emailed through. Your customer service is really poor and this is a pretty straightforward and simple request. I refuse to pay any more for a service that I am no longer using!

Please let me know what other options I have to get in contact with you guys to cancel my contract.