it's a low end-ish taiwan/china bike company still loosely based in England.

are you saying it has notches that a hook spanner will fit into, on the outer edges of the ring? many use a punch to loosen those...

there are hook spanners in various sizes for such parts...

if the 6 indents are in the FACE of the cups... i'd contact them about the tool to remove the BB. remove the bad part in a fairly destructive manner, then get a more normal BB to replace the junked one.

search: "Ridgeback Bicycles" and email them. if you're in England, they have a network of "Stockists" scattered about.

the biggest variety of special BB tools available that i know Does NOT show a 6 point BB tool, other than an external notch type. they sell about thirty or more sockets and wrenches for BBs.
search: "Bikehand.com. catalog"
they even sell special sockets for the bosch mid drive e-motors... those are 7 notch design, mostly....

Campagnolo makes a external 6 notch BB ... Park has the BBT-4 tool for those... not sure of the OD on those cups though.
the Chinese Love to copy other designs, so it may be what you are dealing with... ?