Migration fee for service not signed up for.

I received my monthly invoice and boom to my surprise I am being charged R4900 migration penalty for a service I never signed up for.<br> Upon contacting the call center I am told that I signed up for a contract migration from smart-50 to smart-100 on \Social Media\", since when does a person sign up for anything on social media.<br> <br> Now my service has been cut, this is by far annoying and frustrating at the same d**n time.<br> <br> 1. How do you sign up your clients without their concern?<br> 2. How do you sign up your clients via social media?<br> 3. How do you charge a penalty fee of R4900? how sane is that.<br> <br> Can someone contact me and resolve this issue, and I need relavent answers as to how does one sign up for a new contract or whatever it may be via social media<br> <br> Kindly revert me back to the contract I signed up for and enable my service."