Unauthorized contact

Someone from their call centre contacted me (claimed), in fact tried x4 times during the day, to sell me credit, I'm not a client, and have never contacted them for credit. Only gave her name 'Portia', and would not give me a telephone number of the name of her supervisor so I could verify that it was not a bogus call. Very poor showing from Absa. they should be reported to the Regulator for having my detail without my knowledge and approval.