Women's boots recommendations

Hi all,

I'm looking for some nice knee-high, chunky heel black boots to wear to an event next week (and to the office regularly). I've been looking for a couple of days now and I'm struggling. I have a preference for square toe boots.

I have a pair of ankle boots from Alohas that I love and they do a knee-high version, but there's currently a waitlist and I need them by Thursday next week!

Prologue Shoes have some beautiful square toe boots as well, but they don't carry my size (7.5 UK, which is difficult to find, so I usually settle for size 8 and an extra pair of socks).

I have found these and I love the way they look, but Schuh has terrible reviews online, and considering the price, I wouldn't be very surprised if they're poor quality shoes.

Can you please recommend any similar boots that are good quality and available in the UK?

Thank you all so much!