Good day I have experience a traumatized situation at Motus Nissan Menlyn when I took my car for service

Good day I have experience a traumatized situation at Motus Nissan Menlyn when I took my car for service. It was my first time taking my car there as is close to my work place. Firstly I used an online booking but there was no SMS confirmation for my booking until I decided to give them a call then the lady who was assisting said she has received my bookings. She didn't say if my car was still in service plan or not like the other dealership(BB Nissan Sinovile) does when I book for my service. Even on the day I took my car for service they didn't say anything. To my surprise when I went to fetch my car the told me I have to pay R4300. 00 of which I didn't have by that time. My point is that if they could have explained everything in full I couldn't have accepted to take my car for service at that moment. I'm still stressed by this situation