Although We Renewed Our Agreement, Vodafone Contract Was Not Renewed

about two months ago, Vodafone called to ask us to renew our contract. We talk to their customer service, agree to the deal they offer, and think that everything is fine in the world of telecom. When the due date comes around, bam! We are given a huge ₺814 bill and Vodafone's reason? I see. They say it's because we didn't renew our commitment. We're not happy about this surprise bill, so we do what anyone would do: we file a complaint. It's like déjà vu every time we call for an update—a new complaint is made, and the only thing they suggest is that we pay that big bill. Let's get this taken care of before our patience and money run out.