How long can a pension plan administrator hold up my pension payments while researching for a QDRO?

I retired on March 26, 2014. I was married almost 10 years and I have been divorced for 11 years and have not remarried. My divorce decree states regarding my pension that a "QDRO will be submitted" but doesn't say which party was to take that action. A QDRO was never drawn up by either of us. I am the defendant. My company's pension plan administrator says they are holding my pension payments until they can determine if there is a QDRO. I should have received 5 pension checks by this time and I have received nothing. I currently have no income. How long can the plan administrator make me wait until they pay me? Is there any action I can take? Are they going to contact my ex? My ex currently has not taken any action to file a QDRO even though this person knew I was retiring and that I have retired.