Thank you for your feedback and for bringing this to my attention.
Having investigate this further, I note that you placed your order at 8:39pm on Thursday 24th August. As stated on our website, next day delivery is available for orders placed before 6pm which, unfortunately yours wasn't. Your order was therefore despatched on Friday 25th for next working day delivery which, because Monday 28th was a Bank Holiday, you received your order on Tuesday 29th August.
Although I feel that our delivery instructions are very clear https://www.redbuscartridges.com/delivery-information/ I have refunded the £2.45 as a gesture of goodwill.
Kind regards
Donna