Mobile WiFi E5573 not working

Device was delivered on Wednesday, 30.08.17. Unable to test as sim card not activated. Telkom activated it on Saturday, 02.09.17 & the device only stays on for 10 seconds. Received an sms from Telkom this morning & the contract differs from what I was sold telephonically. I have tried to phone Selldirect numerous times but there is no reply. I would like to take advantage of the 7 day cooling off period if this is the level of service offered & the contract differs.