Solvay interview questions

I interviewed at Solvay Specialty Polymer in Alpharetta, GA in April, 2021. The interview process was smooth. But it was a very unpleasant experience with Solvay on the reimbursement process. I paid meals and hotel myself and Solvay promised to reimburse my expenses. It has been more than 4 months but still I did not receive any reimbursement. I communicated with Solvay on this matter but it has been more than 2 months still nothing happened.