Hello, thanks, only just seen the replies.
I contacted the seller twice, first time I got ignored, then she offered to resend the item. I didn't want it resent as it was a small guitar accessory for my son and he was able to borrow one as there was no chance of it arriving on time for him to use for his performance.
I discovered you have to wait for the 4th day after the final delivery date to file a claim, which I did and the refund was done within an hour.
The part arrived today. It was posted in a non padded envelope with no wrapping around the part, only posted the day before the final delivery date ( despite me getting an email from the seller saying it had been posted over a week earlier) and the postage on it was only £1.49 ( I was charged £3.99 P&P)
I am still in 2 minds whether to inform them it arrived, I am naturally honest but the fact they were clearly overcharging on P&P is making me think twice
Never ever had a problem buying direct from Amazon but this was a marketplace seller.