Turkcell Charged Higher Bill After Contract End Without Consent

My Turkcell postpaid line’s “Bol Star Fırsat 40 GB” annual subscription ended on March 20, 2026. I had been paying around $14 per month for this plan. However, despite the expiration of my commitment, a new bill was issued without my approval, and I was charged approximately $25 for the next billing cycle. I became aware of this situation on March 24, 2026, and I do not accept being charged such a high amount for just one month without my consent. I did not receive any SMS, phone call, or clear notification requesting my approval before this new billing was applied. When I contacted Turkcell customer service, I was told that they could not cancel the bill and that it is standard practice to automatically move customers to a more expensive plan once their commitment ends, without requiring explicit consent. Instead of resolving my issue, I was met with a response that clearly favors the company and disregards customer rights. I request that this $25 charge be canceled and that this unfair billing not be applied to my account. I also ask that necessary measures be taken to prevent similar issues, ensuring that no billing changes are made without customer approval. If this charge is not canceled, I will escalate the matter to the Consumer Arbitration Committee and the relevant authorities to initiate formal complaint procedures.