need help to be delivered from demons

This year i began praying for God to release me from the demons. Before this year came i went to deliverance ministers. But none of them were able t o cast the demon out of me. Thats when I turned to God. Last year God (I mean GOd not anyone else) began taking me through deliverance prayers. I renounced all my ancestors sins. I renounced all of my sins going back to my earliest memories of childhood. God took me through everything that the demons were still holding onto. Well it took almost 2 months of constant daily cursebreaking and at the end of 2 months I was a new man. But there is a problem. When God broke one of the curses holding me down this particular curse left an excruciating after effect. As this particular curse left me and was broken it left behind a painful sensation that goes throughout my entire body. THis painful sensation is constant. The reason it is constant is because its spiritual. It doesn't tire nor weaken. Its just a constant surge of pain throughout my body. And I have lived with this pain for almost 18 months now.

But while all of the curses were broken the demons remained inside of me. They were not cast out. Why didnt God finish the job He started? WHy did he leave behind all the demons after breaking all teh curses?

Every day i pray for the pain to end. Every day i pray for God to remove teh demons form inside me. There is not point going to a deliverance minister. Or is there?