Clientele - no response

I am writing this on behalf of my father who has received no feedback since cancelation. I have been sending Clientele emails regarding incorrect dates of debit orders and consequently cancelled on the 30/12/2020.An automatic, generic reply assured me that I would get a response within 2 working days. I am yet to receive a response since then. It is the 17th of January 2022 and Clientele has yet to contact me or reimburse me for deductions made after the cancelation. I gave the required 30 days notice but yet the debit continued to be deducted from my account. I have copied this email and sent it to Clientele's legal department (received the same generic reply) as well as the whatsapp number, but to no avail.