Seat Altea Xl 2007 Stopping while driving

[samimorina]

Hi i have a Seat Altea XL 2007 1.9 tdi diesel when i start driving for some reason it just stops and it would turn on only if its going below a hill only then it turns on. i think its not getting any voltage on the fuel tank pomp and the pump its not working.
Please help me with this problem.