Bad customer experience

Again another dissapointment, I mean what did I expect, I did receive a call but when I answered nobody spoke and then it was dropped twice and today too! How interesting, there are 3 ways of communication, sms, email and direct calls, I would prefer email as I am always busy when they do decide to call and how do you resolve a complaint without handling it or even making an attempt to resolve it, nothing has been done absolutely nothing, you can email me so that I can be able to respond, I mean, my complaint is in writing so I don't get it why is it so hard for vocadom to hire people who understand what is customer service because what is happening is worse then I don't know, I no longer have words. What I need is ? For my payment method to be changed to cash payment or direct payment online, the agent that decided to upgrade my tarrif with my consent to revoke put it back to what it was before and an email confirming that these changes have been made, otherwise I will be taking this further.