Poor Rain customer service

Hi I'm a Rain customer for some time now and I'm quite happy with the network however the customer service is PATHETIC I changed my billing date to the 1st of each month but they disconnected me on the 25th of the month and insisted its the 25th of the month they also deducted half of my payment instead of the full amount most of the agents are not very helpful at all. And this is not the first time this happened. And I work from home.