Vodacom refuses to refund me(or provide proof) for an unauthorized WASP

So for 2 months Vodacom billed me for an unauthorized WASP(For over R300), When asked to provide proof that I subscribed(because they are meant to have Two-Step authentication) they refused. They told me to take it up with the WASP Itself who isn't even a registered WASPA member and does not have a contact number. I've been a loyal customer for 7+ years and this is just absolutely disgusting. In the future I will not touch Vodacom with a 10 foot pole.