Non-existent internet connection with no solution.

We have been experiencing internet connection as slow as 3Mbps when we are on the 30mbps plan. We called Rain, and the consultant does not have a solution for our problem except for telling us to move the router around, which we have been doing since yesterday in the afternoon to no resolve. We are told that there is nothing wrong with the tower we are usually connected to, but suddenly we are not connected to a tower way far from us, hence the slow connection, we tried resetting the router countless times to correct this, but it doesn't help either.