having a few probs my my cossie at the mo

it keeps overfueling, done it 3 times now in about 3 weeks

was just sat there in it last nite with the engine ticking over then it died and wouldn't start again, you have to leave it about 30min til it starts again

had a new fuel pump fitted n the wiring re done about a month ago, and a full set up if that could be anything to do with it?

any ideas