Poor customer service and billing system

Awfully disappointed with Rain. For the past 2 months, I have been struggling with multiple deductions from my ***. On the 28th of Sept, I was charged for Oct. On the 3rd of Oct, I was charged for Nov because I changed my payment date. Now, I am expected to pay again. I have reached out to customer service and no response. I work from home, now I need to buy data.