Location Permission Letter

When we decided upon Westfields Shopping Centre for one of our many locations, we realised we needed permission to film in there. We found what we thought would have been a relevant department to send a email to them, but with no reply, when we went to film on the day we was turned down for security and advertisement issues, they insisted they had no email from us, but it was later revealed that we had emailed the wrong department. This was an unforeseen error in our filming and we filmed the specific scenes elsewhere, so we did not need permission to film anywhere that we had decided to.