Shockingly poor service

South African booking number just plays music for extremely lengthy periods, whilst I hold on at my expense. This has been ongoing, I phoned the "agent support" person in Johannesburg, who glibly and casually told me that holding periods on the reservation service could be ONE HOUR and is the NORM. She seemed completely unconcerned with my complaint as she only deals with travel agents. Told me to try in the morning..or else expect up to any hour's delay!