Want my account back

Hi<br> I recently upgrade I was never told the phone runs on data was told it Bis only when I strated using it it took iup my voluntary limit and was softlck I call twice to sort it still no joy somebody needs to take responsibility for this and reverse the charges on the phone I will not pay for the same service twice I spoke to Siva from cancelllation he will let them collect the headsetbut I want my account to be credit back not my fault I was misled