How do i keep my hair straight and under control?

so whenever i shower and wash my hair with both shampoo and conditioner. the next day the hair feels great and its soo soft and smooth, but it gets so like no frizzy cause im chinese and dont have frizzy hair btu it has tons of fly aways and it gets poofy and wont stay straight. what can i use or do to make it stay straight the next day. when i blow it out with a blow dryer it gets the same way all frizzy and my hair pieces are so apart and not smooth and straight. its hard to explain, i hope you udnerstand. so if anyone can give me some hair product that arent crazy expensive or some of those anti frizz anytime spars idk. anything thanks a lot guys <333