Unauthorized Subscription: Missing Airtime

This is the third time that I have been subscribed to WASP services without my knowledge, opt-in or authorization with the SAME SERVICE PROVIDER: OPERA TELECOMMS by Vodacom. I have given Vodacom and Opera Telecomms written and verbal instruction on several occasions that at no time have I or will I give consent or authorize any of the subscription services "offered" by Opera Telecomms (aka Oxygen8), yet it has happened for a 3rd time. I demand a full statement of account for the subscription and a full refund of all money deducted from my airtime. It is also very bad business that I am not able to see these subscriptions on the Vodacom App because of the nature of my Vodacom Contract.