Refund wanted

I bought Microsoft 365 family package in August on the instalment 12 months option. Firstly my card was charged twice and I couldn't reverse the 2nd charge. Than I waited for the Product Key and still didn't get that. I than tried to cancel my debit order as per the steps provided on the website. Nothing help. I sent an email to get this subscription cancelled and got no response. Microsoft still continues billing my account and is leaving me with bank charges. This is freaken frustrating and most unprofessional service I have ever got especially since it was my first time with Microsoft. I want my money refunded and close my account.