Festival tickets on GetMeIn?

I’ve just bought tickets for myself and a few mates to this new festival called “Neighbourhood Weekender” which is in Warrington on the Bank Holiday weekend at the end of May. The legit tickets sold out in seconds months ago but are trading on the ticketmaster resale site for around 1.3 times face value which we were willing to pay.

But now I’m paranoid that they aren’t going to turn up in time because even on the GetMeIn website it says something about the event organisers sometimes only sending out tickets the week before, and I’m not sure how the reseller is going to forward them on to me in that time. Can someone reassure me? GetMeIn is supposed to be reliable if a little pricey.