Vodacom forced **** subscriptions

Good day

I have a huge problem on Wifi account. I had purchased a vodacom wifi contract, 20 Gb daytime, 20 Gb nightime. The wifi works perfectly.

The odd thing is that i don't know the sim card number and i have never given it out. The wifi has been getting SMS's from vodacom +*** saying it has been subscribed to VR 360 Planet for free for one day and then be charged R10 a day after, then it was subscribed to a N* news for R5 a day. Now i'm getting SMS's saying i have insufficient airtime. I don't know how this is even possible, the wifi sim number has never even sent a SMS or no one knows the number. The only people that have the number is Vodacom that gave me the Wifi. Why is vodacom subscribing me to these things? I need these subscriptions cancelled, and if my account is being charged i need that cancelled too. It is just amazing that a number that is unknown can still get ****med.