Sensitive information are asked as confirmation

Please guys, if you task a call centre employee to contact clients ensure that 1) they call from an identifiable telephone number 2) Correct info are stated/quoted to the client 3) and asking of sensitive information is an ABSOLUTE NO NO NO! I got a call from the mentioned person (VERY PROFESSIONAL) and he asked me about my security supplier/system. This is not acceptable and if you want to brand me as uncooperative so be it. If you don't call me from an identifiable telephone number (which I can call you back on) then don't bother to call me and I prefer to be contact via e-mail!!!