Upgrade done for data without my knowledge or per

Account number I ***/9 I HAVE HAD NO FEEDBACK FROM MY HELLO PETER QUERY DATED 8th MAY only the obligatory courtesy email to say somebody will get back to me. I do not have a 3 gig open contract for my data. I returned the debit order Now help please what must I do. I phone the call centre legal dept and go around in circles because nobody gets back to me??