If you're in Thailand avoid Phuket Dragon Muay Thai. One the trainers knocked me out

It was the end of the group session 90 minutes of work has been done I am exhausted and me and the other students are doing light sparring after a round the trainer puts his gloves on and asks to spar me. What proceeded was less of a spar and more of a fight for my life. The Thai trainer was throwing 100% bombs, overhands and power hooks at my head until he got me on the ropes and I felt a sharp sensation in the back of my head and everything went black for a moment. I came to and realized I got knocked out by him and was dizzy for a few minutes. Once I came to I confronted him and he played dumb and just kept dismissing me "okay.okay" So I confronted one of the head trainers who is going to be getting me ready for a fight and he was also dismissive just saying "I don't know what happened "repeatedly. I got angry by the lack of care so I took my stuff off and went to the corner of the gym to let my head rest. Then I saw the same trainer that hurt me go against a complete begginer who was much smaller than me. He was wailing on the poor guy, the bell rang and he kept punching his head until the poor guy fell to his knees. The rest of the trainers didn't even care. So that was the last straw for me and I left class. I'm looking to change gyms unfortunately I've paid for the rest of the month and doubt I will get my money back, but the worst for me is I've traveled to Thailand for my dream to fight and now it's in ruins because of my concussion. I'm so heartbroken I can't train or fight. It's my whole reason for being here.