No Assistance - unauthorized deductions

In October 2022 it came to my attention that my cell number is being use to do purchases without my consent. I contact Vodacom customer service for assistance, they keep on explaining that it is my responsibility to contact the provider. In December 2022 I send them an email, because the same deduction with deferent amount was still deducted from my cell phone account. They send me an email explaining that this deductions was from I Store and I need to contact them. So I did contact them, I Store have no history of any purchases on my account and my method of payment is via credit card and not my cell number. I ask them to close this account, but to no avail. Still to date I have the same problem, unauthorized deduction on my cell phone number.