Unwilling to return my money..

I attempted to cancel a service from this company before it was provided. They had a debit order loaded on my account in no time. So I wrote to them on 11 January 2023 to cancel my debit order and my service agreement with them. My debit order was earmarked to run on 25 January 2023. Two weeks later, the debit order ran off my bank account and no-one is prepared to assist me to refund my account. These are mafias of this industry. I want my money back. I am now told that I should have cancelled the debit order at least 30 days before the time. This is a dishonest company. Stay away from them. Zach ***