Failure to provide service offered, or rectify the issue

I renewed my Vodacom contract on the 12th of June 2017, where I opted to take a new phone and insurance. The insurance was never loaded for my device, and after months of back of forth the issue has not been resolved. The "solution" provided is that I contact the insurance provider directly to register the insurance. There are a couple of problems with this:

1. I signed up through Vodacom so I didn't have to chase up on this. Why is it now my problem because a Vodacom employee wasn't competent enough to fill the application properly?

2. If I go directly to the insurance company, my total monthly rate will be higher than what was originally quoted to me, which as far as I'm concerned constitutes *****.

At this point, I will certainly NOT be recommending Vodacom to anyone, and will be looking into moving all contracts away from Vodacom in future. Frankly, this kind of lack of service is disgusting.