Disrespectful service and poor processes

I received an sms from Brooks and Luyt with a reference number and contact centre number of *** - I quoted the reference number and asked them to confirm the name of the person that they were trying to reach as I do not have the a loan account with the company they have indicated in the sms. The person that answered indicated that she could not confirm the name and wanted me to confirm my personal details and ID number which I refused as this is how we have identity theft :(.