Complex sentence: But Rana, despite the success of the campaign, changed the small agency, which we can say that IL VOLO Agency is the moral "father" of the invention of Rana testimonial, who after two years became the testimonial of himself.
Split into simpler sentences: But Rana, despite the success of the campaign, changed the small agency. The IL VOLO Agency was the inventor of the Rana testimonial, who after two years became the testimonial of himself.