HAS VERY VERY VERY THICK HAIR... PLEASE HELP?

Well ive tried products that just dont work for my hair... Ive tried straightening but it takes me practically 2 to 3 hours, and i barely straighten anyways because i know it will give me split ends :o( i have ultra thick wavy hair and ive tried products that are horrible and some that are ok but want something that gets rid of frizzy hair and adds more shine, softness and silkyness... Any suggestions and tips would be helpful :o)