The annoying repetition of the recording which does nothing by frustrate the listener indicates the quandry created by such depersonalization. There is no real response to the caller; no communication has been established.
I definitely believe that the author's purpose in writing the poem was to create one of the most annoying poems ever. Just reading it raised my hackles. The poem really brings to life the impersonal nature of technology and phone service messages.
With reference to language, the impersonal computerized voice is clearly brought to the reader's attention with the elipsises separating the extention numbers. Digital reception is certainly frustrating. The pressing of numbers to make decisions is also not very personal either. It makes one hope that at some point, a human who understands the plight will answer and know how to help in a better way. Ironcially, that doesn't happen when the human actually answers and the viscious cycle continues. The poet's intention behind writing this poem has got to be to show the caller's frustration, but also to make human receptionists in this daily situation stop and think about what the caller had been going through before actually coming into contact with them.
I think that this is about the way in which technology can make our lives more frustrating. Technology is supposed to be something that can help us and make life easier. However, it is often used in ways that end up making things worse. This is one such example since the person making the call is having his or her time wasted by the automated system (and by the heedlessness of the person who finally does answer the phone).