The Worst Teeth Whitening Experience

So theses are pictures I took the day after my whitening treatment .
when you look closely you can see Weird marks on my teeth and gum inflammation on both sides. (The gum inflammation is from the rigid mouthpiece she forcefully insert in my mouth asking me to bit harder)

My experience after spending $300 CAD on teeth whitening was utterly disappointing. Not only did I end up with unsightly white spots on my front teeth and strange marks, but the entire treatment was excruciating and far from satisfactory. I observed no noticeable improvement except for the unwelcome marks.
My appointment was scheduled for 6:00 PM, but I wasn't attended to until around 6:30PM- 6:40 PM, with no apologies offered by the staff.

The individual conducting the treatment lacked basic courtesy—no initial greeting or introduction from her side. She abruptly handed me a gown and slippers, and upon lying down on the chair, she shoved glasses on my face. This was surprising given my earlier interaction with Dra Loayza, who was friendly, as well as the kind receptionist.

It was weird as I find colombian so friendly so I took the initiative to introduce myself and attempt small talk by asking for her name but she did not seem interested at all or perhaps was it the language barrier.

Before starting the procedure, she didn't bother to ensure my comfort. There was no display of the anticipated before-and-after images or explanation of what to expect from the treatment, as I've typically experienced with other dentists.

The room's excessive coldness from the AC made me shiver, and she placed my head at the edge of the headrest which was causing a throbbing pain.

I regret not canceling the service after the painfully rushed 'cleaning' part , which lasted a mere 5 minutes. I even unintentionally swallowed a cleaning agent (baking soda I assume) as I was choking, but her delayed response to suck out the product and lack of concern aggravated the situation, leaving me with an unpleasant taste in my throat for the rest of the treatment.

During the whitening process, the mouthpiece initially used was soft, but she later added a rigid one, causing intense discomfort and gum pain. Despite my expressing discomfort, she insisted I stay still.

Overall, it was the worst decision to undergo treatment there.
It's quite regrettable for them because I was actually trying out their service. The primary purpose of my visit to the clinic was to address a missing tooth and get a dental implant before my departure for Montreal. Additionally, my sisters and I had plans to return for veneers. However, this basic whitening treatment has left me feeling traumatized.