Please assist with the incorrect charges on my profile

Good Morning Team,

I am sending this email to dispute the charge on my line of almost R2000 for all those sms sent. Upon further investigation on my side after speaking to your consultant and being sent my printout (itemised billing report) I have determined that I never sent those texts to that number stipulated on my account. Those texts were sent from 12am in the early hours of Monday morning consecutively for about an hour resulting in my line being charged. I have never heard of that company nor have I ever interacted with them in anyway. I can only but determine that those were somehow added to my line by mistake or *****ulently. Since I took out this contract I have not once went over the allocated minutes that I get for free even my sms or data line has never exceeded the threshold offered to me by Vodacom which comes with the line. I need that amount to be removed from my statement please as there is something fishy going on with the charge as never will I send sms's that amount to R2000 never. I am happy to pay my normal billing amount of R240 until my contract is paid up however that charge is *****ulent and I cannot be held responsible for something I never done. Please let me know once it's removed. Thanking you in advance