Subscription charges refund?

I noticed some suspicious charges on my bank statement and after doing some digging I found out that it is a subscription (which I knew nothing about) from a family member that used to be part of my family sharing plan. He’s was removed from family sharing months ago and I assumed that meant he couldn’t purchase anything from my bank account. After going through my statement it seems £9.49 has been taken from my bank every week for the last 14 months and I’ve had no email or invoice from Apple for these charges. Is it possible to get a refund on these?