No stock - modem & mobile phones

On 15/12/2015 we purchased a new Aztech mode. Connected it on 16/12 and went on leave on 18/12 (unplugged the device as we only returned home on 30/12). On our return on 30/12 we tried connecting to the internet with no luck. Phoned Telkom to assist and was advised to return the device to Telkom Mall@Reds. We took the modem back on 02/01/2016 and was informed that they have no stock. We asked for a refund, in order to change from service provider and was told that we had to return the device within 7 days in order to be refunded. There is no mention of the 7 day money back clause on the docs that we received when we purchased the modem. We are now waiting for Telkom to get stock - in the meantime we have cancelled our Telkom data and subscribed with another service provider. While we were at Telkom numerous clients were turned away as they had no stock on any of the specials they have advertised. One of the clients asked to check if Centurion Mall had stock, the reply was NO. There was a form that he had to complete-no form could be found (probably also no stock)! Not sure how long we have to wait to have the modem exchanged. Thanks to the new service provider!