False advertising and no service from Sanlam

Early in February 2021 I received an e-mail from Sanlam saying "act quickly and save on tax by paying a cash amount in excess of R5 000-00 " This had to be done before 28 February 2021. I responded and after numerous e-mails to follow up I received a phone call from a Mrs Visser who tells me the Sanlam employees are working from home. All I needed to do was to complete a declaration and a quotation would be sent. It is now 15 March 2021 and nothing forthcoming. Again, e-mails and the response is that the matter will be resolved on 10 March, then 11 March and the last was 15 March 2021. Not a peep from them and 15 March has come and gone. This is false advertising and on top of it all NO service, although I have been a client of Sanlam since the late seventies.