Jenny,
I'm sure there are lots of South Africans living in Glasgow, many of them Afrikaans. See if you can pick up a copy of the
South African Times UK and consider placing an ad in it if you don't find any "South African gatherings" advertised in its pages.
Failing that, you can visit the
Kudu Club and you should be able to access a few South African radio stations. At least one of them is an Afrikaans station. You might also be able to access 5-minute long TV snippets, but you'll have to make an account (they don't spam you so it's okay to give them your email address).
Ches