Wi-Fi router

<p>Good day</p> <p>my name is Immaculate Mahlangu,on the 9th of June 2017 I bought a prepaid WiFi router for R599 witch comes with 500 mb I used the router on Friday night Saturday morning wen I log in data used up ,I bought 1gig on Saturday today when I log in data is used up I did not down load anything I was Browsing I don't understand,I have other 2 Telkom mobile numbers a prepaid and contact numbers and thses has never happened 1gig lasts me the whole month even when downloaded from the app store,I'm so dissaponted as I trusted Telkom mobile I have been using for 3years.the number in question is ********** 406</p>