I am currently in the process of moving from BT to another provider after roughly 20 years as a customer. Why you ask?
Well because of two letters that arrived a week or so after the last bank holiday weekend.
BT kindly sent the most recent quarterly bill just before the bank holiday weekend with an incentive to pay up within 4 days (actually 1 day when banks were "open" - the letter took well over a week to arrive - thanks to royal mail!) otherwise I get hit with the late payment penalty (aka "early payment incentive").
Stuff this I thought, they can wait until after the weekend hols and I will pay it then. So later that week toddles off to local post orifice and pays now roughly 5 days late bills.
The letters that *really* pissed me off arrived together two weeks later - sent the day afetr I paid the bills.
1) a **disconnection** notice unless I called then that *day* and gave them my (non existent) credit card!
2) a tailored "valued customer" mega discount offer offering me some services I already have via BT.
I called 1) and asked if the payment had arrived they said yes but I will get some MORE threatening letters and I should ignore them! So, BT are now so desperate for cash they will cut off any customer who fails to pay thier bill in less that two weeks - or are the disconnection threats merely that.
Me I take threats personally.