Baby daddy drama 🙄 what would you do?

My sons father is pretty worthless. He only sees our son about once a month. I try to initiate visits and try to get him to see our son but he always has an excuse. Today (father's day) I texted him in the morning and asked if he planned on seeing his son for Father's Day (he hasn't seen him in 4 weeks). He said he planned on getting him this afternoon. I said that was fine. At 4pm i hadn't heard anything so I asked what time he was getting him. He didn't reply. I called him at 7. He didn't answer. At this point I just wanted a reason as to why he'd bail on his son especially on Father's Day. He finally texted me back and said he had to work late. But shortly after that his girlfriend texted me and said he was off work today, he never mentioned to her that he planned on getting our son today & that he was actually taking a nap that afternoon. Not working.