Poor Customer Service

I called SARS to have my efilling password reset and spoke to a lady named KELLY VAN DER MERWE (spells her name as if its so difficult) at the Cape Town Call Centre (according to her). She was extremely rude, spoke to me as if I'm stupid. I confirmed all my details with her but she couldn't reset my password because they still have my old cell number and e-mail address. Instead of making me understand that once she resets it it will be send to that cell number she tells me she cannot help because my details is outdated. Is it so difficult to say \Sir