Okay, change of plans as this is not going to work.
Your new Smart Visa is already approved, so why do you ask Facebook in stead of the BOI who approved the visa to change your status,
IF you go to Immigration and apply for a new Extension and get the stamp NOT APPROVED, the only thing left is leave the country in 7 days,
You can not use that final decision to pack your bags and leave for conversion into any new visa without actually doing as told by leaving the Kingdom.
You cancel your Extension of Stay based on education on the day your education stops.
You do not get a new Extension of Stay based on waiting for application of a smart visa, you must meet one of the regular requirements of get the not approved stamp and 7 days to leave the country, You may come back with a tourist visa to sit out the waiting time.