Did you actively cancel the old contract? Contracts don‘t just „run out“, if the customer doesn‘t cancel they renew automatically. If you didn‘t cancel (and have no proof that you did) chances for a refund are slim. Also the customer is responsible to check his transactions regularly.
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Thanks for your reply,
I had actively canceled the contract. I had send a message to vodafone for which I had received below auto-reply:
I only have this email from vodafone which I have pasted below, My internet was disconnected exactly on the day when the contract expired. Therefore I had requested a new contract after the internet was disconnected.
This is the email from Vodafone:
Subject: Ihre Anfrage an Vodafone: Produkt- & Vertragsdetails - Kündigung - Kündigung Vertrag