Why must I

At 09:11 today I received a call from one of your agents. She wanted to know when payment for the device can be made as the device is now off due to none payment. I requested if they ever read notes, as when speaking to an agent last month I had requested my payment date to be shifted to the 25th. This was then advised to me to have been updated. I assumed that all would be well and I made my payment on the 23rd. This morning the device is off and now met with this call. The agent then explains that the payment on the 23rd would only be for 30 days and I would then need to pay again. Firstly, this then makes no sense in updating a payment date if regardless of when I pay the device will only be active for 30 days. Not to much of an issue to deal with and on I went with my life. This was until 3:31pm when another agent called me, demanding I make payment. Rude and argumentative the agent continues to demand a payment. I then ask the agent if they are stupid as they are unable to comprehend what I am asking, which is " do you not check notes". I then rudely get told that "Do you think I would be calling you, if there was notes". Now again, how is this my problem. To further my annoyance I then ask for a manager and the rude agent first barades me with more stupidity before telling me to hold and then terminating the call. She deserves every bad review she gets and should reconsider her career choice in customer service.