Failing To Pay Outstanding Royalties

This is by far the worst customer service I've experienced in forever. 2 months ago SAMRO requested that I update my banking details, in order to receive my royalties due to me from the 2017/2018 Financial year. All of my details have been updated and all they are telling me is that the money will be in my account next week...next week...next week, that's 4 weeks ago. I'm literally phoning them on a daily basis. Yesterday again they tell me to wait 6 DAYS!!!!!!