Don't go to Renault Bryanston

Today 2019.03.20 I took my car in for service, I got pushed to this due to a rattling sound that my car was making on the axle or tyre section (I'm not a mechanic hence the uncer*****y of the problem area).... My instruction which was written down and I have a photo of... Was: Don't open the boot!!. I waited an 1h30 for the shuttle making me late to work. I start at 8h30 I got to work at 9h30. OK as if that was not bad enough, at 2pm they call me to tell me they want to pick me up, they are done with my car..... (no regard for my work and employer about getting to work late in the first place) I kindly tell them I can't and negotiate for 4h30. 4h00 I get a call they want to fetch me I should wait outside. I wait 20mins (this is after apologising and having to beg my employer to excuse me) no car....... Then eventually the shuttle arrives, 4 people in the car, I squeeze in. I get to Renault Bryanston to hear what my rattling sound from the car is about. I read the diagnosis RATTLING SOUND BECAUSE OF BUMP IN THE BOOT!!!! And mam if you want a second diagnosis you will have to pay the technician tells me. I asked why..... Also why didn't we both inspect the car why didn't you call me about this. His reply, oh I thought you didn't know you had a boot problem. You will have to pay for the next diagnosis. No regard for my time no regard for the specific instruction and clearly no regard for my life and others on the road....... Just a you will have to pay. I have to pay for their incompetence. I'm so disappointed angry and worried for other Renault drivers with the rattling noise and get told its because their windoww was not closed properly. Just don't go to this branch. They are careless and only care about the money forgetting an alive customer pays rather than a dead one