Hello Lorraine, it sounds like you're doing what they need and you may be more successful after they have been spayed/neutered .
We purchased two cats at the same time and found they didn't need humans either because they have each other.
That changed after we got ours spayed. Now after 1 yr they are both loving and not as ready to tear around with each other though they still play games from time to time.
Also,it's a good idea to leave the pet carrier open in the home for a while.Put their favorite toy,a treat,a towel to curl up on.You may find they are a little easier to get into the pet carrier next time.
if you've not considered getting your cats spayed or neutered here's some information on why and when for you.This particular website does a good job on helping the pet owner help the pet!
Spay & Neuter for Cats
If you have any more questions please let me know ,I will happy to help you!
THANKYOU FOR YOUR QUESTION.
Have a nice evening.
Thankyou & God Bless!