Contacting MP and ATIP request doesn't help at all. ATIP you will able to see your file status but CIC's notes on files sometime hard to understand that case no help. MP doesn't do much they just send request to find out about the status of file and CIC tell them status as in process also MP doesn't have authority to speed the process. Still you can contact to your MP just to satisfy yourself that you tried every possible mean to process your file faster.