"So I rang up British Telecom, I said 'I want to report a nuisance caller', he said 'Not you again'"

This quote by Frank Carson is a funny take on the aggravations of handling customer support. It suggests that the speaker has actually needed to call British Telecom multiple times to report an annoyance caller, and that the customer support representative recognizes with the speaker's voice. The quote is a lighthearted way of expressing the speaker's exasperation with the scenario, and the customer support representative's absence of helpfulness. It also suggests that the speaker is not being taken seriously, and that the customer care representative is not taking the nuisance caller issue seriously either. The quote is an amusing way of revealing the speaker's disappointment with the customer service experience, and the absence of aid they are getting.