ATT Fixed Wireless - Slow Download Speed

When is the Fixed Wireless internet download speed issue going to be fixed? I am paying for a service that is not what I was promised and that is not working. We cannot even use the internet when we get home in the evening. We depend on the internet in our household and this service has not worked smoothly since we started in December. I would just like an update on the timeframe it will take to get this issue resolved.