I’m reaching out for help or advice on behalf of a colleague. After 17 years of service at his job, he recently received a letter stating that he has been receiving incorrect enhancement payments for the past 12 years and is now required to pay this money back. He is unsure of who else to contact, as he has already spoken to ACAS, but found them unhelpful. The amount owed is significant, and the monthly repayment demands are quite high. Any guidance would be greatly appreciated. Thank you.