CAS-461582-P1M1D1  You should be done fixing it any day now ...
after testing it can I buy DJI care,, then ??

Your case is under progress, we'll take care of it, no worries.
After repairing the aircraft, you can purchase DJI Care Refresh for your phantom 4 pro, please send an e-mail to djicare@dji.com with your aircraft SN and case number, our support will help you handle it.
Or you can submit a video here: https://repair.dji.com/en/djicare/customerupload, our team will review the video and send you an e-mail in about 3 business days.