if it is coming by Yodel, then it may be delayed as they have serious problems and a large backlog of parcels/.you must contact the seller and ask for tracking details, and go into paypal ( if that was your payment method) and stop the payment.
I would wait until it arrives and then ask for a partial refund as courier in 48 hours was not achieved, i.e see what that weight would be with normal post and claim back the difference.