@ gurjinder ... the fuel level needle showed 1/4 tank and the reserve indicator was not on. The last time I filled fuel before the service the indicator first flashed on a couple of times then came on constantly and then low fuel was signalled on the on board display. By this time the needle dropped below E. I always fill the tank full. I agree with Gurjinder that the fuel pump may fail on its own but it can't burn out because there was no fuel. I suspect the service guys messed up with the fuel gauge during service because of which I ran out of fuel and now they're trying to cover up.