Bad Service

My father recently lost his 83 year old wife and their bank account is frozen, it is 3 months now that the home loan debit order has bounced as the account is frozen, he has asked them numerous times to change the account details to his new account and this has still not been done... seriously where has the service gone to, this is unacceptable, he is 75 years old and has been back and forth with no help. Please contact him and resolve this problem *** ***. Mr MD Campbell-Codner.