I believe there is a spiritual dimension. But you can't get into contact with it through mediums, spiritual sessions, dancing tables, or Ouija boards.
I also doubt that you can get in contact with angels and gods through prayers. Prayers are primarily directed to a phantasy God of a particular kind: a God with an elephant's head, a right-wing evangelical God, or a dogmatic misconception of a God. If you get into contact with the spiritual dimension, it's because someone there has contacted you.
You may notice it in a synchronicity or some other form of ESP, and you realize that something happened to you. You are an idiot, and someone in the spirit world was trying to help you—or maybe punish you because you are an idiot who refuses to listen. A spirit directed the steps of someone in the material world, which caused you to bump into each other.
Some people believe that there is no spirit world. Well, that may be so. There are many different kinds of beliefs in the world.