Did the shop do an alignment after the strut install? This is an absolute necessity when installing front struts. If you had new springs installed with the new struts then there will be some settling of the springs after a few hundred miles, but that would not cause the pulling or wandering that you describe. Take the car back to the shop that did the install and have them align it. If they do not have the equipment to do alignments, then take the car to someone else for the alignment; but do let the original shop know of the pulling problem and the noise you are hearing.
Mike