A small bag is a payment for an account :

I sent you a small bag of pebbles to which I have assigned a value of £1000. If you don’t accept them then the debt is discharged".

https://quatloos.com/Q-Forum/viewtopic.php?t=10712&start=1700

They have given me every opportunity to pay the balance or arrange payment to resolve the matter but I have chosen not to pay, theres nothing more they can do therefore consider the matter closed, they will however seek torecover the outstanding balance, British Gas will not be liable for any fee scedule I choose to set out. If I contact the ombudsman , please share this information.