Pepsi Promotion Gone Awry - Struggling to Redeem Codes

I bought about 6 one-liter bottles of Pepsi for around 110 Turkish Lira, and they threw in a 330ml Pepsi can as a bonus. However, I had a problem with the promo codes because the deadline to use them had already passed. The last day to redeem them was October 31, 2023. I called Pepsi's customer service at +908502207062 many times, but they never answered. They told me a dealer would call me back, but that never happened. It looks like they're trying to trick people instead of actually helping them. I'm not getting any help even though I've tried multiple times to fix the problem. Here's my phone number: My name is Mehmet A****** and my mobile number is 0553********46.