Any advice for my 6 year old

So my six year recently had a big change in our house hold dad became addicted to drugs I had to kick him out and I put a restraining order on him he been having bad days because he misses him today was a bad day. I just told him dad wont be living with us no more he has something called bi polar and has some anger issues and daddy needs some help but he loves u very much. He said help like doctors I said yes baby. Now it's been 2 almost 3 weeks and he really starting to miss him and act out when he asks to call him I tell him he has no service were he is. Any advice on how to have him cop of make him feel better my heart is broken