Paying for a service that we not getting

We have a LTE WiFi that's suppose to give us 20mbps. We've been on and off for 2 weeks that I've been complaining and logging the issue. Each time they say the tower has an issue. So no one has gone out in the two weeks to resolve the tower issue. This is unacceptable, we just need to keep paying and not receiving what we paying for.

We've been having issues with this contract since we received it.