Are you referring to a character limit on a text input field on a website (where you can send in a question or talk about an issue or provide feedback), something like that?
While I certainly don't really get character limitations in places like that, simply somehow getting around the limit on the front end might not do the trick. If a site properly implements a limitation like that they will also check it during the submission process itself, meaning that even if you manage to enter more than the limit and start submitting it there can still be a check of the actual submitted content which could reject it if it's beyond the limits that are established or perhaps just not consider anything beyond the limits and cut it off at the limit point and thus only submit part of what you entered.