N11 Issued an Incorrect Invoice for My Galaxy M34 and Ignored My IMEI Request

On Sunday, I purchased a Galaxy M34 device from N11. However, despite repeatedly requesting it, only one IMEI number was written on my invoice. In order to benefit from the student tax discount, both IMEI numbers need to be listed. I called N11 customer service, and they keep telling me to wait. Even though this is their mistake, they are causing me inconvenience by making me wait. The task they need to complete would take at most 5 minutes, but despite contacting both the store and customer service multiple times since yesterday, they have not resolved the issue. I need the phone right now, but I cannot open the box because I have been informed that if I open it, I won’t be able to return the phone (I will return it if both IMEI numbers are not on the invoice). They are causing me inconvenience here. Additionally, by issuing an incorrect invoice, they are committing a violation. If this issue drags on any further, I will unfortunately have to file a complaint with the Presidential Communication Center (CİMER) and will seek compensation for my loss (tax discount) through the Consumer Arbitration Committee.