Very very very bad service

I called the call centre more than a week and a half ago asking to change my cell number and email address to be able to log into my efilling profile as I don't have access to the old details. I was given a case number and informed the matter was escalated and that someone will call me in 72 hours. Today I give a call to the call centre to ask why no one calls back and I was advised that the 72hts is calculated based on the hours SARS is open daily. 8hrs a day so I will get a call in 9 business days. I am not sure if we don't understand English or people working for SARS doesn't understand what business hours mean. This is extremely bad service and that you have the nerve to say on Tue Pre recorded message we must treat them the same way you want them to treat you.