Replacement of faulty router

A Vodacom LTE router that was supp**** on contract failed at the end of June 2022, within the guarantee period. It was taken to Vodacom at Hillcrest Corner Mall where it was proved that it would not connect to the internet. We were told it had to go away for checking and it would take 20 working days. A loaned router also did not work. At the end of Aiigust a new router was supplie but we were told it carried no warranty apart from the initial 7 day one. We said that was unacceptable , and were promised that an email confirming warranty would be sent. No email has been received.