XPO Sr. ACCOUNTANT interview questions

Very unsatisfied: Was lengthy process, most important thing was compensation, I disclosed my expected salary at the first round with HR and was told that it is achievable. 4 interviews took place, technical questions, at the end, I was offered the position but the compensation was offered way lower than initially agreed on and reason was not satisfactory. I even came down a little but still the offer was lower than I am currently making. I was not expecting this from billion dollar company and specially after 4 long interviews.