What kind of attorney do I need to help me make my invention go smoothly and watch out for my best interest?

20. I signed up with an invention promotion firm, patented my inventions, paid $630 for a book and digital video disks for my product’s invention for analysts economic profitable and this area of the inventions would be health and beauty. I put a down a payment of $250.00 towards the $5,850 additional the firm is asking for, the senior director of products which is supposed to be working on my product inventions hasn't honored his part with the marketing and the inventions admission book etc. I had to ask to speak to the president of the company.