The team told him not to overtake, you say he didn't agree to this. Do you have that on record? Webber's attitude to Vettel after the race indicated without any doubt that an agreement had been made between the team and drivers before the race, based on their positions after the last pit stops, and Vettel clearly broke that agreement.
What concerns me and no doubt Webber also, is the number of silly little car failures he's suffering at critical times during GP weekends. The Ill feeling between Webber and Vettel since their falling out clearly still exists and I'm left wondering whether Webbers lack of reliability since then is a convenient way for the team to keep them separated on track.