It is quite a common thing for people to consult mediums who take trances of unenlightened beings to ask for things such as wealth, health, and to resolve personal problems. Most people do this without thinking about the repercussions or consequences. Yes, these beings that take trance and speak using the medium's physical body may seem to be very helpful. But who knows the real reason why it is being so helpful?
Unenlightened beings are not to be dabbled with because there must be a reason behind what they are doing. Meaning, they surely want something in return for the help they offer. That's why they are unenlightened beings and bounded here among the living because of their attachments. And we can never be sure which is good and which is bad. Even GODs get angry if their help is not returned with proper offerings. These unenlightened beings can be very powerful and deceiving. They'll hook the confidence of the person who ask for help, and even appear as a holy being such as Tara, to give advice and help for many years before showing their true colour.
Hence, have great faith in the 3 Jewels and practice diligently what is being taught by the Lama. It is by understanding ourselves only we can resolve the problems that plague us. Not through short cuts such as consulting mediums for luck, and wealth because even if they can solve the problem and not ask for anything in return (which is quite unlikely), the same problem will just keep coming back, because we do not understand the root cause of the problem due to our dependence of a quick and easy way to resolve it.