Can I transfer my crew member entry to my guardian visa in Thailand?

Hello group,

Is anyone in the group a crew member or have dealt with something similar as my situation? I flew in as a crew member on a Gen Dec(general declaration form) form Nov 2nd. It is my understanding crew members are allowed a maximum of 30 days. They also do not stamp your passport so I have to keep a copy of the gen Dec for when I leave so they understand how I got in. But I also posses a one year guardian visa here in Thailand. Normally I have to leave anyways due to work but this time I'm on vacation and don't need to leave. Is there a way I can transfer the entry to my guardian visa or do I still have to leave and come back? I tried calling immigration but as usual with them I was more confused then before calling. She really had no idea I think but would not admit it. Also my airline I work for has a very small operation here and I'm the only pilot doing this, so they won't know either. Really would like to hear from someone who might do something similar as me.

Thanks!!