Captcha solvers mostly have case sensitive option in their api.
You can use it but you might need to go custom with http client.
It's tricky.
What solved it for me was:
Screenshot in Base64 of the web;
Write it to disk
Post https://api.telegram.org/botXXXXXXXXXXX:SECRET/sendPhoto
Post using the postdata constructor as example: -- "chat_id",{{chatId}},"photo","file://" + {{Image folder location}} + "screenshot.png"
use multipart content type