Complex sentence: Lauwers gave back five of the ten bags and promised to pay $50 for the five bags that he had used, but failed to pay back the money, and Kasso beat him on four separate occasions.
Split into simpler sentences: Lauwers gave back five of the ten bags and promised to pay $50 for the five bags that he had used. Lauwers failed to pay back the money, and Kasso beat him on four separate occasions.