I thought you had moved. There is the sequence of tenses

HAVEN’T SEEN is a present situation, so you use the simple past.

Here’s an interesting passage in a book.
When the speaker is thinking about the event in the past, she uses the past perfect. But when she addresses the other person in the present, she uses the simple past: https://books.google.com/books?id=11Y3AwAAQBAJ&pg=PA51&lpg=PA51&dq=%22I+thought+you+moved%22&source=bl&ots=EnY8LboKGd&sig=yQa_mGf_nHkufD8jN2fsC2PIbWQ&hl=en&sa=X&ved=0ahUKEwjqjLTcl4fXAhWESyYKHVSWCUgQ6AEIUDAM#v=onepage&q=%22I%20thought%20you%20moved%22&f=false