Appointment made in August for the overhaul of my ...

Appointment made in August for the overhaul of my clio IV, around 430 euros, they forgot to notify me by SMS that the overhaul was carried out, if I did not go there around 6.30 pm I will have recovered my vehicle the next day, moreover they called me two days later to tell me that they forgot to put the maintenance book back in the glove box, working during the week I go back there on Saturday and I am told that 'they don't know where he is and that you have to come back during the week ... for a performance of 430 euros it's deplorable