LinkedIn Premium Renewed Without My Consent — Requesting Full Refund

I started a LinkedIn Premium subscription on July 26 just to try it out. However, without any prior notification or warning that the trial would convert into a paid plan, ₺3,600 was deducted from my account over August and September. I am a student and cannot afford this amount.
I request an immediate refund of the ₺3,600 to my Ziraat Bank account and the immediate cancellation of my LinkedIn Premium subscription. I have not been able to reach LinkedIn customer support, and this has caused serious financial distress.
I expect my issue to be resolved urgently and the unauthorized charges refunded without delay.
Progress

After the free trial period of my LinkedIn Premium membership ended, I was charged twice through the App Store without my knowledge or consent. A total of 3600 TL was withdrawn from my account in August and September. I am a student and my financial situation is not suitable for this payment. I was completely unaware that my membership was renewed and that a fee was charged; as soon as I noticed, I immediately canceled the membership.
I contacted LinkedIn customer service about the issue, but I was directed to the App Store. I also requested a refund through the App Store and I am still waiting for a response. I request that the fee be refunded to me and that my grievance be resolved.
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