Vodacom - How can we ***** our exiting customers

I recently submitted the cancellation of my topup contract to prepaid, what a nightmare this was already as the consultants on the cancellation team pretend they can't hear you and drop your calls. You also have to wait on hold for around 20+ minutes. After a hellopeter post, the cancellation notice was processed. I was informed by their team that I will lose minutes and data (this is fine). This morning my cancellation was processed and I lost about R 240 airtime. I mean, I'm moving from topup to prepaid, why take my airtime? You deserve 0 stars, you are greedy. You have shown your true colours and will never see me again.