Depends who the customer was and whether I liked him or not ....
Obviously if it hasn't been dropped, stood on or misused in any way, then it has to be a faulty product. It is very unlikely that it is a manufacturing problem as these pole sections are made in 1000 metre lengths at a time and then chopped into sections. Using this process, it would be very hard to have one part of that length of a different quality strength than the rest of that batch. The fault is most likely to have occurred because of being crushed or stressed in some way. This could have happened in many places - in the factory before assembly, in the crate whilst in transit to the UK or whilst in the hands of the courier whilst in transit to the customer.
Whatever the reason it would obviously need a replacement section.