Good job. Do not respond. Just another manipulation tactic.
I would suggest that you save those texts and get them to your attorney. A bit of CYA on your part.
I would also suggest that if you do block him from your cell phone, make sure you have a 'speaker' on your house phone, put his calls to the girls on speaker and 'record' them on a tape recorder of some kind. Then those tapes also need to go to your attorney as you are going to start to hear his 'manipulation' used on your daughters.
He is 'escalating' and you are certainly doing your part to 'stay the course' towards your divorce.
Remember we are walking with you in spirit.
Love and hugs,