Petra

Can anyone help me with a query I have regarding a recent service my jaguar xf just had. They told me the battery light had come on and that there was copious amounts of clean water in the spare wheel and battery compartment. There are no holes and all the carpets are bone dry. The car had been driven the day before and no battery light had come on or other issues. We are feeling suspicious and would like any advise or explanation. Many thanks Petra