Vodacom Unjustified Steep Increases

I have been a loyal Vodacom customer for YEARS, but I am honestly flabbergasted by their complete lack interest n their customers and their mindset of doing absolutely just what they want the last few months. I have had a wifi contract package with them for the last 24 months with the initial fee being R440, it went up last year to R474, which was FINE honestly, my contract expired yesterday and my last payment is R667.99, this increase has happened in a matter of four months... I phoned vodacom at the end of July to cancel my contract and query the increase, upon requesting a cancellation, they consultant promptly offered me the same package I was currently on for R300... so why the steep increase if they can afford to give the same package to people for R300, which is less than half my last payment.... When I queried the increase the consultant informed me that she had no idea why the steep increase and referred my query and assured me someone would come back to me, I am still waiting for feedback... My husband also has airtime and data packages with them which has also increased steeply, but we are still receiving the same amount of airtime.... How is that possible? I will honestly never advise anyone to try vodacom after this experience....