I’m glad you managed to find another one of those playpens in the UK, hopefully it will be fine, I got mine from Zooplus years ago & it works well for a smaller playpen when I need it, the faulty one probably was just a fluke.
I’ve had Zooplus tell me not to bother returning a faulty item before too which saves a bit of hassle.
It’s a shame Happy Henry’s take so long to deliver but it is just a small business & they seem to be swamped with orders.
You have to step over or in the playpen to get round my living room too, it’s a hamster room really!