They've split across the knee.
Because according to their Customer Services, it's down to wear and tear... extremely bored voice "I'm sorry Mrs Catbert, there's nothing we can do as you bought them four months ago. It's down to wear and tear".
What? (Said I...) I have had things from Primark which cost me 1.99 last longer than 4 months - and you are apparently a quality high street retailer? It's not like I do manual labour in them... I don't even get down on my knees and change nappies any more. I just WEAR them. Around. And About. And not every day maybe once a week. So by my reckoning, I have not worn them more than 20 times.
(continued and poignant silence from other end of the phone. When she was sure my ranting had finished...) "I'm sorry Mrs Catbert, there's nothing we can do as you bought them four months ago. It's down to wear and tear".
(I reeeeally liked them too )