Vodafone They Vowed Stability in Bills but It Soared, Customer Service Ghosted Me

I've got a Vodafone line, number 5434****87. So, here's the deal—I got a call from a Vodafone consultant just before my contract was up. They sweet-talked me into sticking around, promising to fix my bill between 300-350 TL for two years, assuring me it wouldn't budge even if there were any rate hikes. Fast forward to two days before my contract expires, and bam! I get this message saying my bill's going up because I'm not part of any campaign. naturally, I'm not thrilled. I called customer service pronto, told them about our little chat, and insisted that I was supposed to be in this magical campaign. But oh no, they wouldn't buy it. So, I asked them to pull up the records, listen to the conversations, and prove me wrong. Silence. Despite me calling them up countless times over a month, they kept saying they'd get back to me. Guess what? No callbacks, no resolutions. I'm dead sure about what went down in our conversation. Vodafone's saying it's impossible, I'm saying, "Check the recordings!" But no dice. So, here I am, dealing with a telecom giant that couldn't care less about its customers. Enough's enough—I'm pulling the plug on my line.