I have a 2004 santa fe with a fueling problem.?

My check engine light came on went to dealer had them check it out,they came out with a code check told me they replaced the vent valve, the day after went to fill my gas tank up I had a very hard time fueling ,the pump kept kicking off went to a other gas station to check if the same thing happen it did went back over to the dealer because the next day I was going on vacation told them the problem they said that I needed a new fuel gauge on the dash panel it was faulty I explain to them I had a hard time fueling they said that was because the tank was full ,well I took a chance taking vehicle on the trip had to much money to lose and could not get a rental for the next morning.took me about 7mins. to put about 4 to 5 gals of gas in,put over 1000miles on the trip, this put a damper on our vacation and now ready to fight.I;m not a mechanic but I told them it was a problem with the fuel tank.Well it looks like a problem with the gas tank DAH.Any answers??????