i want to change my name and other things and this happen everytime https://youtu.be/kUq6NBvINKo

I tried changing the browser and im currently using game client and i can't event change my name, bc i don't know can you help me? And i can't even write in chat it says n order to get access to chat and forum messages, you need to play a few battles in the matchmaking mode. Battles left: 3. If you have any problems with entering the game, drop an email to our customer support service: help@tankionline.com..... And iam Warrant Officer 2

Hello guys. I have a question, i was playing Tanki Online like 4 years ago and like 1 week ago, i want to play some nostalgic games and i found Tanki. I logged and everything pick a hull and tank, and clicked to play and the play button didn't work and the menu too. Please HELP! Thanks.