I suspect the dealer did not change the valve. They said they did not remove the fuel tank.They did remove pump assembly and was wondering if valve could be serviced through pump opening.
Driving a 2010 Audi a3 s-line
2010 audi a3 s line roll over valve can be serviced through the fuel pump opening. The tank does not have to be removed, spoke to audi mechanic. However they should road test your car and recheck for fuel leaks before releasing your car. If your car smells like gasoline when you pick it up there might be a problem.