Womens Dunlop Wellie Shoe Green

I have been trying for ages to find replacement gardening clogs, but cannot find anything remotely suitable.
The original pair I bought years ago just don’t seem to be available now, and this is the 3rd pair I have tried.
Unfortunately, Brookfield Comfort not only charges postage to send them, but still charges to send them back! Not many online companies charge you both sets of postage, and it’s costing almost half what I have paid fo the shoes in the first place.
NOT very good customer service, in my view.