OPutstaning issue that hasnt been resolved notwithstanding my calling Vodacom constantly to have it resolved

The Vodacom package I was on was discontinued in June / July this year.At the time I was only offered one alternative which was a more expensive package. I am on a month to month contract following my contract ending in February 2017. Vodacom isn't assisting with my downgrading even though I am on a month to month package and was only told about one option when my package was discontinued. Every time I call Vodacom, they say they are still investigating. This has been going on for months now. Shocking service even though I've been a loyal Vodacom customer for years.