pipe connecting to the engine out - the clamp seem 2 be cut

My worry is that 5 months ago VW Hatfield fixed a problem with the aluminium pipe on the same vehicle which was fixed under warranty, but now told the pipe is not covered and do not understand when they checked the leak 5 months ago the pipe should have been indicative ( the brown plastic inside the pipe seem to be aged and had broke making the rubber lose ( I suspect)