Turkcell App Mistake: Doubled Price Less Data Package Activated

I am a Turkcell postpaid subscriber and, while my existing commitment was still ongoing, I accidentally purchased a new package via the Turkcell mobile application due to the system’s guidance. My current package is 90 GB per month for ₺480 that is 1,080 GB per year for a total of ₺5,760, whereas the mistakenly purchased new package offers only 240 GB of internet for the whole year and reaches a total cost of ₺9,600. In this situation, the amount of internet is drastically reduced while the price is almost doubled, which is clearly against a reasonable price–performance balance and causes serious consumer detriment. The package purchase was made through the application on Saturday, March 20. Since my existing commitment was still active on that date, the new package was not immediately defined on my line and remained pending in the system. During this period, before the new package was activated, I called customer service many times by phone and clearly requested cancellation, but I was told that no assistance could be provided and my request was rejected. Despite all this, the package that I did not want was defined to my line on Monday, April 20 at 00:01. The last 4 digits of the line subject to this transaction are 4067 and my line is located in Istanbul. It is not understandable how a second postpaid package can be defined in the system while my current commitment is still in force and why the consumer is not clearly and sufficiently informed about this process. Although I clearly stated that I would not use this package and withdrew my approval, the forced activation of this package both causes me direct financial loss and seriously damages the relationship of trust between me and the operator. I request the immediate cancellation of this new package that I do not want and purchased by mistake and that my previous commitment be continued under the same conditions. If my old commitment is deemed to have ended in your system, I request that the invoice and all accrued amounts related to this new package be cancelled and that I not be charged with any unfair debt. Otherwise, I state that I will apply to all legal avenues, especially the Consumer Arbitration Committee, on the grounds of unfair gain and misleading the consumer.