S.R.
Seek help through some type of agency to get the support you are entitled you and deserve.If he was able to get more time with them, you need to step up and get child support on a regular basis.Also be sure to document EVERYTHING. Write down when the girls go with him, what they did during the time, who they were with, when you receive child support, how often he calls them etc etc. Contact as many people/organizations as you need to until you find someone who can help you get what you and the girls deserve.