Planet Nissan

Took my vehicle in for repair in November, a additional repair was done at that time which was found by the technician and ever since I've been hearing a rubbing grinding noise that cannot be found. Trying to resolve the situation I got the run around. Soon after that I hear terrible noise coming from under my hood now it's the fan. My vehicle only has 56,600 believing a tool was left under my hood from the previous work. I took it in explained the problem as well as my battery was checked and indicated that it was reading low, I asked to see my parts after the work was completed I was totally ignored and my battery was not checked. In between the issues stemming from November and forward I contacted the BBB. A Frank call's and gives me an appointment to come in now they're saying it's my brakes making the noise 5 months later although I just did the brakes in September before the noise started in November after the work Planet Nissan did, but I was told (the brakes and rotors are not bad enough to change right now you just have squeaking and that's what's making your steering wheel shake) I never told them my steering wheel was shaking? Took it to someone that only does brakes nothing wrong with pads or rotors green light on that. Battery under warranty they replaced it and didn't properly install the negative cable when driving on the highway to California the dashboard and radio went in and out making popping noises. Growing up with Mechanic's I have to look the next day because it's dark. I can't unlock my car because of the battery connection I open it with the key the negative cable is completely loose and can't be tightened for whatever reason and the service department is closed on Saturdays at Nissan without an appointment. My life is worth more than a car but when you put trust in a company that is supposed to service a customer with quality work at Premium cost this is not the place. I am appalled, angry and disappointed to the point where I don't even want to drive my car anymore because I don't know what might happen next because Planet Nissan doesn't want to own up to their mistakes that one day cost someone their life.