Nah, Nikola is a racist piece of shit and he needs something put right in his mouth.
Don’t worry, next step is calling mladen at his company.
Clearly, the screenshots you provided fail miserably in proving any racist or disrespectful behavior towards you. On the contrary, what is evident is that they took the necessary step of blocking you from the customer support chat due to your own blatant lack of respect towards their support agents. Customer support representatives are there to assist and provide solutions, not to endure unwarranted abuse. I can understand that you may feel frustrated and disappointed by your financial losses, but it's important to approach the situation with a level-headed mindset. Your inability to approach the situation with courtesy and decency led to the consequences you now face.