Impossible to cancel services

I recently signed up for some upgraded services on my Vodacom account and was told to contact the cancellations department to cancel the services I was replacing. The cancellation department is even called the retentions department and their staff there make it impossible to cancel services. I attempted to cancel services on a SIM card I have not used in almost two years and after about 30 minutes I still could not get the consultant to cancel this SIM card despite the fact that I don't even have the SIM anymore.

Further to this, I wanted to cancel a lower data package on the SIM card I do use as I upgraded to a much bigger package but this was also made impossible. I'm now sitting with a lot more data and minutes than I need because Vodacom has made it impossible for me to cancel these.

I've been a customer at Vodacom for around 12 years now but will definitely cancel all contracts I have with them when it comes to an end. They clearly don't care about giving their customers the solutions they need or removing those they do not need.