Excellent signal, no connection

I have the latest firmware according to the techs and called the company. We reset the router twice and no change. Ever since the update I have had long periods of the internet turning off daily and the router saying 'Unsupported Sim' during that time. When I talked to someone they said it will take 3 days - 2 weeks to get a sim card mailed to me, or I can pick it up. I explained I am a disabled veteran and I cannot get out of the house to go pick it up. I asked if they can leave the internet on as I will be paying for it anyways as they send the new sim and the answer?

No.

So my choices are to either lose out on half the time of my bill cycle for my internet and have no way to attend important doctor appointments for up to 2 weeks, or keep putting up with it going out randomly for 3+hrs a day. It is not a throttling issue as I have barely used 12gb of data in the month. 

For all those experiencing the same issue, its a white box with a screen. When your internet goes out? Hurry as fast as you can to your router to see the message. It may hurt to move that fast but the message is only there for a few seconds.

As for the speeds? 8.84mbps down and 15.7 up? I have gotten better speeds on Cox and other providers and I pay much more here. Its not what was advertised and I am getting fed up being lied to. A one month internet rebate does not cut it for compensation when my health is on the line.

Be aware its a growing issue.