Being forced to upgrade my account - prefer month to month

Good afternoon, Please could your consultant or 3rd party agencies STOP contacting me to upgrade my account?

I am not interested in upgrading my account at this stage, and if anything changes, I will then make contact.

Month to month is preferable to me right now and Vodacom still gets their money so unsure why the constant calls are necessary.

I can make a decision on MY account and finances

Thank you