Any large organizations like Enom, Trend Micro, Virgin etc.. has this problem to ignore all the complains that does not relate to the quality of their products and specially for those who are not their customers.. We have to just pull out the guns to explain them what has gone wrong at their end.
With Virgin they simply say that the problem is not in their network and when our engineer put all his efforts to explain them the situation they will just utter "hmmm.. send us an email and we will have a close look..." and we are back where we started from...