Refusal to block lost contract sim card.

Yesterday,I contacted Telkom call center in order to block my lost Sim card. Unfortunately I was connected to a rude, unprofessional and uncaring consultant whose name was difficult to remember or pronounce, but spoke in an Indian accent. I reported my contract sim card as lost and politely ask for her to block it but she refused claiming I was irresponsible and negligent. I, further explained to her that my sim card is not pin protected therefore anyone who picks it up can use it instantly and the sim is still loaded with a Gig of data and over 3000 minutes of talktime, instead of acting on my instruction as a customer she insisted I go to nearest Telkom shop for sim swap. I explained I can't as I was waiting for my six year old twins to come back from school and three year old son to come back from creche as I have to care for them, wash their uniforms, prepare food for them and assist with their homeworks but she still insisted I go to the shop for sim swap. Moreover, I advised her that the nearest Telkom shop is at least twenty kilometers from my place, I have to take two taxis per trip costing R58 for something that can be done telephonically. In conclusion I believe since I reported the matter immediately I wouldn't be liable for any costs incurred from the period I reported until someone decide to do the right thing and block the sim. Should the be any financial loss it must be recovered from her salary. I'm deeply disappointed about the bad service I received from Telkom.