Hey how are you??? (sorry this response is late)
But in response to your question I will first and foremost say I am a very honest and blunt person...So I would flat out tell that family member "You only call or talk to me when you need something" if they disagree with that start giving them examples of all the times they do so (The more the better)
If you are not as blunt as I am which to many people are not :)
Just shut the door on that person for a while meaning no calls or text should be sent to that person because if they only call when they want something why should you even allow them to be in your daily life???
Hope this helps...Keep the questions coming :)
Be safe,Be blessed,Be YOU!