Automagic expects me to make an appointment without knowing how long the repair will take

Woke up to a call from Automagic to make an appointment for my scratch and dent claim. They don't offer the mobile service so I would have to go drop off the car at one of their workshops. They were unable to provide me with an estimated booking date and an estimated completion time. I explained that I am in durban till next week and I will be going back to jhb so I need some level of cer*****y. Her response was that she was from the head office and she has absolutely no idea how long the repair would take. Keep in mind that auto and general first had to review my claim and asked for pictures of the entire car, they have the full context and I'm sure that was sent to Automagic, all I needed was a date range where I would not have a vehicle. This is extremely disappointing