New contract without even your acknowledgment

I am so disappointed with Vodacom I had a contract of 400GB monthly which came to an end 31/12/2023. To my surprise after calling number of times to explain I don’t want any contact including the WhatsApp data now there is a bill under my profile saying I owe R59 for the WhatsApp contact that I didn’t even take ref no. ***. Can they remove this since I did not take and when calling they say it’s sorted but you will end up paying.