About minecraft mail changing

[PlebBase]

Error! Request denied. To get help with changing your e-mail address visit our Support Center. When contacting customer support, make sure that you include your game purchase transaction ID.

Does this mean you have to wait a certain time before changing your email again?

 

[PlebBase]

yes, you can only change your email every ~30 days
this also means there is a dispute link somewhere

Is there anyway you can check the last changed email? Is it more than 30 or lower than 30 days?