Exorbitant Debit Order of R18841 for a R315 Contract

MTN took R18841.74 on a R315 contract on the 31 Jan 2024. I have all the evidence that this data usage wasn't mine. I have my itemized bill from the MTN app. Several calls logged no response. Has anyone got the same problem and been offered a response. How did you resolve. I am extremely dissatisfied with their customer service, complaints and escalations teams. Seems robotic. And their is Noone to call!