One of the things I hate the most is people I'm transacting with telling me something has to be done in a certain way because that's how "their system" works.

A recent example, I forgot to pay my phone bill on time and network access got turned off. I came to pay it on Friday, and they tell me the notice will appear in their systems only on Monday and then it takes 2 days for the system to automatically reactivate my access. No, they can't make a simple phone call to someone in the company, yes I will be charged full monthly price for the next month even though I didn't have access for a few days, nothing we can do - ciao