Suspected ***** and ******* activity on my account by Vodacom

Vodacom have been charging me R525 each month for about 23 months for the number I is not mine and I complained to them a number of time. Each time I complain I get told that they will investigate this has been going on for the past mentioned months, now my account is in areas as a result. At some point they disconnected service because of areas for the number that I don’t know and don’t have.