Relaxers dont work well on carribean hair (which is weaker than other hair) and causes it to snap off! Try Straiteners or strong prof conditioner (L'Oreal) on wet hair & comb strait (makes it straighter).
Try weaving & plaiting with added cotton/silk ribbon to weigh down hair and control.
nb Relaxers are a strong perm solution.....snip a length of hair and soak in perm as pkt recommend; dry between two sheets of cardboard to see result. Pull test hair for strength....if it snaps easily then forget doing the rest of head.