Vodacom bundles not working

I have a WhatsApp bundle that is not working and Vodacom refuses to correct their mistake nor refund me my money for a service of theirs that does not work. It's honestly not fair that I spend money on a bundle and for it not to work and not even be refunded for it. I called the contact centre and they ended up blocking me from calling or escalating the issue. This is absolute pathetic for them to actually bring such service to me after I've supported them for so long.