Ok. If i am paying child support. And she doesn't let me see my kids what so ever. And she has full custody what can I do

In order for you to do anything, there has to be a significant change in circumstances. There can be nothing done unless there are grounds of significant changes which would require the court to interven. A family law specialist can best assist you. If you require additional information, feel free to contact my office and speak with a case manager at 877-866-8665 or email help@smsattorneys.com for clarification.