Unacceptable and unprofessional service ever

So it is clear that Natrent does not want to refund deposit to tenants. I have been notified that my I will receive my deposit by end of the month. Everything been communicated via email. Now only two days left when I follow up I have been told the expenses are too high. I have sent my banking details with bank confirmation letter as requested to get my deposit now I'm not getting my refund???OMBUDSMAN should do do justice to windmill park estate residents....it is too much now