Can I cancel my Non-ED visa from a language school and extend under a university before it expires?

The user wants to cancel their Non-ED visa associated with a language school and apply for a new Non-ED visa linked to a university before their current visa expires on October 22nd. The community responses clarify that this process requires canceling the existing visa with paperwork from the language school and obtaining new paperwork from the university. While this could potentially be done within Thailand, it is dependent on having all documentation ready, and it might be complex enough to require leaving the country.