router not connecting almost daily( very disappointing

I recently bought a v6-1 4g router and its not even 3 weeks but It is giving me issues, 1 days it will connect with no issues, the next it will give issues, since I bought it I think I was only able to connect for the entire day 3 times only, the rest of the days its an issue and this is frustrating as i use it for work purposes, what irritates me is that when I went into the store everyone recommended the router, I don't see myself going into the store again because it will be taken in for repairs, then what will I be using in the meantime?? I honestly need a total refund or a new router from mobicell. This is ridiculous. I thefore need someone from their offices to come in and check this out because I am really DISSAPOINTED. so practically I bought this router 3 weeks ago and only got to use it 3 or 4 times