Very disappointing experience with Renault Mobilit...

Very disappointing experience with Renault Mobility. On arrival at the car park, the car was impossible to move (parked in place at an angle and 2 cars blocked). I was charged 36 for this rental which did not take place. Since I have relaunched 3 times the Renault Mobility service that tell me they can only wait for the return of the agency Boulogne (which does not answer) for the refund.