Not sure what you mean by level 2 visa.
Read your latest stamp if it says "extension of stay".
If you are still on the very first 90 days from the initial Non-ED visa (stamp does NOT say extension of stay), you just leave.
In case you already applied once or more for your extension (every
*****
days and the stamp says "extension of stay"), you need to go to the immigration office that issued your extension to cancel it if one of these is your case:
1. leaving Thailand through a land border
2. wanting to be back in Thailand for another long-term visa/extension