I made a monthly student & teachers purchase for ฿ 712.00 / month and when I accessed adobe, I informed this
(which when I asked the university, it informed me that the university has a license for the university for students to apply for and it let me ask adobe in conclusion, can I use this student email to use adobe?)
your subscription is tied to the email address used to create the subscription. if you create a personal subscription and then cancel it, that subscription still exists and is still linked to the email used (even though the subscription is not active, the adobe apps can't be used and no money is charged/paid).
so, if you want to create a different subscription (eg, through your school) you need to use a different email address than the one used to create the cancelled subscription.