Bad Service at Renault Bloemfontein (Service Department)

I am not happy with the way they handled my case at Renault Bloemfontein. I took my car for service in Reanult/Kia Bloemfontein on the 01 Oct 2020 and the inspection was done to check if there are dents and scratches on outside of the car, I left to go to work and later the same day I got a call that my car did not have a rear wiper blade, I am so confused because when I came in the morning after 07am the person who was checking the car outside did not note that the rear wiper blade is not there. so I went back today on the 02nd Oct 2020 to tell Renault that my Car had that Rear wiper blade when i dropped it for service on the 01st Oct 2020. Renault Service department tells me i should pay for that wiper blade.... I am so shocked and speechless because I knew the Car to have the wiper blade and the technician/inspector did no note as he was checking the extrior of the Car in the morning of the 01st Oct 2020 when I was with him. I cannot get over this shock and I NEED SOMEONE FROM RENAULT TO CHECK FOR ME IF REALLY MY CAR DID NOT HAVE THE REAR WIPER BLADE before I pay for it. I NEED TO KNOW WHY IN THE INSPECTION FORM WHY RENAULT DOES NOT HAVE A PART WHERE THEY CHECK THE WIPERS because their technician was checking the outside of the car and missed to tell me in the morning that my Car does not have wiper blades, if he could see even the small scratch on the scratch. and they told me maybe my children took it out or street kids took it, I just need a proof that I brought a Car that does not have a rear wiper blade, so that i can also be satisfied and be careful next time. otherwise i am Irritated with the service i got from the manager in Renault Bloemfontein.