I’ve paid my bill but keep getting emails about cutting me off

[Polly52]

I've paid my bill before the deadline time, as always.

 I keep getting emails threatening to cut me off or fine me for late payment.

 I think that sending out these emails ONE day after due date is ridiculous.

Past history shows that I always pay well before time, so why the emails.

Please check.

[Mark39]

You should be paying by direct debit or via an automatic monthly card payment. That's what you agreed to do when you signed up. 

You wouldn't then be getting these emails.