Other Fuel System Tank Assembly problems of the 2001 Hyundai Elantra

I purchased this my Hyundai Elantra from a used car lot. It wasn't long after I purchased it, I noticed that when I stopped to fuel up my vehicle that as I begin to pump fuel, it would click like my tank was full. Then I would start pumping it again and then it would do it again. This happens every time I go to fuel up my car. And it annoys me so much. I am disable and have lots of back problems and can't stand too long with out bad pain. It doesn't matter in the hot heat of the summer months or very cold winter days, this is rough on me, in my condition to deal with a car that I love and is the best car I ever owned even though it was used when I bought it to be stressed out every time I fuel it up. Is there a way, free of charge that you can fix my fuel tank to where it will not do this anymore. Please contact me and let me know in what steps are available in getting this fixed by the manufacturer. I think this should be a top priority.