This is disgraceful. I bet yo are still paying for the battery even though Renault have it. My worry would be they leave it is a poor state of charge (over 80% and below 20%) while it is just sat there. So at some point the battery will reduce in capacity earlier than if yo had just used it.
The over issue with it parked up for more than 1 week is the front brakes start to seize. This Handbrake job could grow and grow through no fault of yours.
One lesson for all of us is to keep the rear brakes oiled as per other thread.
Hope it get sorted soon.