Vodacom - Query still not resolved after nearly 5 months.

My issue has still not been resolved with Vodacom. They are giving me the run around and they cant seem to just resolve the issue as required. This has been going on since March 22. I have given them proof that I requested a cancellation on the 31st March. They now have to investigate and in the meantime I am still paying for a service. They are trying to justify their mistake so they don't have to reimburse me or giving me the run around in the hope that I would just leave it.