Non existant customer service

I have been trying to get hold of the South African Service center but they do not answer their phones and there is no email address to the local center. I won't be able to fly due to the COVID lockdown and now I cannot get hold of them to notify them and to request a refund. Horrible service. I emailed there international service center and they just told me to call the local one and gave me the same numbers that I have been calling. I have wasted hours holding on the line hoping that someone will answer.