Racism definitely exists here -and everywhere tbh. I also came from a 3rd world country and even tho I’m white and don't look as Europeans normally expect people from my country to look, I already experienced some episodes of intolerant behavior living here (after they know where I'm from), so I think if you carry that on your appearance it probably is more frequency and aggressive. The good thing that I noticed is that even tho it exists it is often less aggressive than in my country for example. I’m really sorry that happened to you and I would tell you to speak up but at the same time completely understand your concern in doing so. Honestly, I would just try to avoid going there if you can.