Vox - Rude Customer Services Staff

I've just had the worst experience with one of your Customer Care agents and really think you need to train your staff better. I called in to discuss something regarding a new contract and spoke to a lady named Catherine who was extremely rude. I was unable to make out what she was saying due to her speaking extremely fast with an accent and the fact that she was screaming down the phone and the line being bad. When I told her that I am not understanding what she is saying she raised her voice at me even more asking me 'What do I not understand?". She then proceeded to become condescending towards me and still argued with me when I told her she is being rude. As a first time Vox customer I am appalled at the level of Customer Service received and considering cancelling the contract. If this is the level of service you offer from the start, I really do not want to know how it will be later on.