Disappointed once again

I have noticed recently that there is a black dot on my pictures when taking pictures from the rear camera on my S9 which is only 1 year old. I am not sure if its a dust particle of what. Last week I went to Sandton city Samsung and they informed me to go to Mall of Africa as they will be able to assist me. I needed this camera to be fixed ASAP because I'm leaving on holiday tomorrow. This morning I go to Samsung Mall of Africa and they tell me that I need to go to The Wedge Samsung and they will be able to assist me same time due to my holiday. I get to Samsung at The Wedge and 1st customer service does not exist here. They go on to tell me they they need to book it in and will only give it back after 2-3 days. I explained to the lady that I'm going overseas tomorrow and I need my phone, she then goes on to ask me if I'm booking it in or not...I say I cant and she just walks away. I'm standing there shocked and asked her "is that it"? She replies yes. I had issue with my S5, S7 edge and now my S9. I was reluctant to even get an S9 but took a chance and went ahead. How I regret it now, this will definately be my last Samsung cell phone. Guess all my holiday pics will have a black dot on them.