I should be receiving my mavic next week. Is there anyway to buy care refresh now or is it too late?

It is not too late, I believe you must do it within 48 hours of activating the drone.

DJI Care Refresh can be purchased for your Mavic that has not been activated or has been activated for less than 48 hours.
You can purchase the DJI Care Refresh when you receive your Mavic.

Hello,
Instead of creating a new thread, I'd like to ask a sub question : I have just received the mavic combo pack but I don't know when I'll have the opportunity to use it.  I have already opened the box and charged batteries.  If I purchase a Dji Care Refresh now : will it start from now or only once I will have my Mavic activated ?  I mean, I would not activate it now if I only start using it next month !
Thanks !