Deductions from my account

<p>Jill friester</p> <p> ********** 041080</p> <p>I upgraded earlier this year at vodacom constantia. I receive an account from vodacom every month via sms. This month my account is deducted double from vodacom. When i phoned the call center, they informed me that i upgraded in September. However, i did not upgrade in September. What is happening? I did not receive a bill of that amount deducted.</p>