Other Fuel System Fuel Gauge problems of the 2003 Nissan Altima

I had my car for a few months, when I consistently noticed that my fuel gauge was inaccurate. I took my car into greenville Nissan to be worked on twice and they claimed to fix whatever was wrong. That was the depth of the information I received. To this day, my fuel gauge floats at least twice a week. I also wrote a letter to Nissan stating this problem. They thanked me for the letter and that was the end of the correspondence. Also, in the beginning of may, my roof was leaking. Right under the visor on the driver's side, my roof was soaked after a hard rainstorm. I went to the Nissan dealership on midlothian, in richmond,va. The tech told me it may have been the result of a clogged rain drain, and that it would cost $80 an hour just to see what the problem was.