Supposed new router

Since late 2015 I have been having problems with my R206-Z Vodacom router. The router shows that you are connected to the internet but when one tries to down load emails an error message is displayed, needles to say one cannot get into internet explorer. My PC is brand new so the fault is not with the PC as confirmed by the PC technician. The router was given to the local Vodacom shop. I supposedly got a new router. This unit did exactly the same as the previous router. I removed the sim card from the router prior to returning it and put the card into one of my old Vodacom ****les. I was then able to download my emails and also get into internet explorer. Can Vodacom answer me the following questions.<br> 1) How can the second router which is a supposedly new router have exactly the same problem as the original router.<br> 2)I have now supposedly got a new router again. If they are new units why do they not come in a sealed box.<br> <br>