Pathetic vehicle finance!

After buying a vehicle through Marquis Finance in March 2025, My mother-in-law has been struggling for 5 months to rectify issues regarding her account. After changing her banking details, they continued to deduct off the wrong bank account. We tried changing the bank account again after threatening to contact the ombudsman. At last we saw light when they sent an email confirming that the banking details have been updated and the next debit order will be deducted 1 August. Today, 5 August 2025, They are contacting her to state that her account is in arrears. When she tries to explain, they drop the call. This is completely unacceptable. Marquise Finance, We are contacting the ombudsman today!