Ok, so just a bit of clarity here.
'housing unit' has many meanings, among them a part of a big house/accommodation where a section of rooms are meant for a family to dine/sleep etc. So, while the whole house is big, H&M were allocated their own unit of it.
Meghan used the original word and use for the mud cloth.
Another point. South African media is owned by apartheid racists in all. I have not currently checked which ones are going now, but when I was there, only the Sowetan was the black people paper and a few monthly magazines like Bona, Enterprise, Destiny and Enterprise. I admit you have to check this properly as I'm talking from memory ages ago. Surprised, it took so long to jump on the MM hate wagon, tbh like Australia has done. Most black South Africans are not into that and love H&M - I still keep in touch and am told they can, of course identify the racism. These papers get their marching order from the UK. Sinister !
Most of the hashtag you are talking about is driven from royalists, MM haters and bots (all identified by a company that checks). A few people have jumped on the bandwagon to get likes, most are not black South Africans.