20Mustang00

Ok... i have a 2000 mustang and the breaks sqeak and it drives me CRAZY!... ever since we got new brakes on the car.. Now the brakes are about 7 months old and i no they don't need to be replaced. We bought them from a parts store for about $50 i think... my dad changed the front ones and we had to have a mechanic change the rears ones... anyway does anyone else have this problem if not does anyone know how to fix it?!